Site Directory & Tools Index
A full index of every free tool on the site. Filter by category, toggle between grid and compact list view, or search by name to find the exact utility you need.
1-Bit OLED / E-Paper C-Array & U8g2 Bytecode Converter
Convert icons and logos into ready-to-flash C/C++ byte arrays for Arduino, ESP32, and Raspberry Pi Pico. Supports SSD1306, SH1106, Adafruit GFX, and U8g2 formats.
1-Click Browser Bookmarklet Generator
Install draggable one-click browser bookmarklets for DNS & SSL inspection, text cleaning, JSON formatting, and HTTP header audits right in your bookmarks bar.
1031 Exchange Deadlines & Boot Sizer
Track strict Section 1031 like-kind exchange calendar dates and calculate potential taxable cash/mortgage boot.
2-Cycle Gas-to-Oil Mix Ratio Calculator
Calculate fuel-to-oil mixture ratios for chainsaws, weed eaters, leaf blowers, outboard motors, and dirt bikes.
2x2 Matrix Determinant & Scale Factor Sizer
Evaluates the determinant, trace, and inverse scale factor (1/det) for 2x2 transformation matrices.
2x2 Matrix Determinant & Trace Calculator
Computes determinant ad - bc, trace a + d, and invertibility status for 2x2 square matrices.
3-Axis Camera Gimbal Payload Center of Gravity & Torque Sizer
Client-side interactive engineering calculator for 3-axis camera gimbal payload center of gravity & torque sizer. 100% private in-browser computation with zero server transit.
3-Ring Binder Gutter & Margin Shifter
Shift PDF margins outward to add protective gutters (left/right alternating for duplex) so 3-ring binder hole punches never punch through text.
35mm C-41 Color Film Negative Orange Mask Remover & Inverter
Convert digitizer scans of color film negatives into true-to-life positive photographs. Automatically subtracts the chemical orange/amber polymer mask base without creating murky cyan casts.
3D Geometric Volume Calculator
Calculate 3D volume for standard geometric solids with step-by-step mathematical formulas.
3D Layered Box Shadow Studio
Build complex multi-layer CSS box shadows with light elevation angles, ambient blur, spread, and 1-click Tailwind & CSS export.
3D Lenticular Flip Interlacer (2-Image Hologram Print Maker)
Interlace two images into alternating vertical micro-stripes calibrated for 40, 50, and 60 LPI plastic lenticular lens sheets to create 3D flip hologram prints at home.
3D Printable Photo-to-Lithophane Relief STL Generator
Convert photos into 3D printable binary .stl lithophanes for Bambu Lab, Creality, and Prusa 3D printers. Dark areas print thick and light areas print thin so the photo magically appears when backlit by a lamp.
3D Printer G-Code Layer & Retraction Travel Path Analyzer
Inspect raw 3D printer .gcode files directly in your browser. Highlights filament retractions, unretractions, and fast non-print travel moves (G0) to diagnose stringing, oozing, and seam defects without heavy desktop slicers.
3D STL Mesh Non-Manifold Hole Closer & Watertight Cap Repairer
Inspect 3D STL triangle meshes, detect open boundary edges and non-manifold holes, and auto-cap missing face triangles client-side to generate verified watertight binary STL files for Cura, PrusaSlicer, or Bambu Studio.
3D Surface Area Calculator
Calculate total surface area for spheres, cylinders, cones, and rectangular boxes.
4×6 Thermal Shipping Label Extractor
Crop and rotate 4×6 shipping labels embedded in 8.5×11 packing slips into direct 4×6 format for thermal printers (Rollo, Zebra, Munbyn).
401(k) Retirement Calculator
Forecast your 401(k) retirement balance, annual employer match contributions, and safe retirement withdrawal income.
50-State Overtime & Double-Time Pay Calculator
Calculate regular wages, 1.5x overtime, and 2.0x double-time compensation across Federal FLSA, California daily rules, and state labor standards.
50/30/20 Rule Budget & Spending Calculator
Allocate your net monthly earnings into 50% essential needs, 30% discretionary lifestyle wants, and 20% savings or debt payments. Calculate dollar thresholds for each category directly in your browser.
555 Timer Astable & Monostable Frequency Calculator
Calculate square-wave frequency, high time, low time, period, and duty cycle for standard NE555 ICs in astable and monostable modes.
72(t) Early Retirement Distribution Sizer
Calculate annual Substantially Equal Periodic Payment (SEPP) amounts to access IRA funds before age 59½ without the 10% penalty.
8-Bit Retro Chiptune Sound FX & Audio WAV Synthesizer
Procedurally generate authentic 8-bit sound effects (Coin, Laser, Jump, Explosion, Power Up) for Unity, Godot, and retro game development. Synthesizes directly in-browser and exports uncompressed 16-bit WAV audio.
8-Bit Retro Chiptune Sound Synthesizer
Create retro 8-bit game sound effects (jump, laser, coin, explosion, power-up) using synthesized square, triangle, and noise waves.
90/180-Day Schengen Visa Rolling Window Sizer
Calculate remaining legal days in Europe under the strict 90-day per 180-day rolling window rule for tourists and digital nomads.
A/B Test Statistical Sample Size Sizer
Calculate sample size and visitor counts required for reliable A/B split testing to avoid false positive results.
Academic Citation Generator & Bibliography Builder
Generate accurate APA 7th, MLA 9th, Chicago 17th, Harvard, and IEEE citations for websites, books, journals, and videos with live in-text preview and bibliography export
Academic PDF Page Number Re-Indexer (Roman to Arabic)
Calibrate digital PDF reader page numbers so front matter displays Roman (i, ii, iii) and Chapter 1 aligns with Page 1 for thesis submissions.
Add Audio to Video
Combine music, sound effects, or voiceover audio tracks with video files in-browser.
Add Blank Page
Insert a blank page at the beginning, end, or after any specific page in your PDF. Matches your existing page dimensions directly in your browser with zero server uploads.
Add Image to PDF
Document preview workspace for adding graphic overlays, signatures, or logos to PDF documents. Visual image placement engine is currently in development.
Add Page Numbers
Stamp sequential page numbers onto every page of your PDF with custom positioning, starting digits, and font sizing. Runs 100% in your browser using pdf-lib.
Add Shot on iPhone & Camera Watermark Online — EXIF Branding
Add camera watermarks to photos using embedded EXIF metadata. Choose minimalist text or footer banners with 100% in-browser canvas rendering.
Add Text to Image
Overlay custom text, meme captions, outlines, and drop shadows onto photos in high resolution.
Add Text to PDF
Document preview workspace for adding text notes, dates, or form responses to PDF pages. Interactive click-to-place text tool is currently in active development.
Add Watermark to Photo Online — Professional Brand Protection
Protect your creative work with our Premium Watermark Studio. Add text or logo overlays to your images with professional transparency and precision. 100% private.
AES Encrypt & Decrypt
Encrypt and decrypt text using AES
Age Calculator
Calculate exact age from date of birth
Age Difference Calculator
Calculate exact chronological age gap between two birthdates in years, months, days, and total days alive.
Age in Days Calculator
Calculate total days, hours, and astronomical milestones since your birth date
Age in Days Calculator
Find out exactly how many days, hours, heartbeats, and breaths you've been alive — with life milestones, cosmic perspective, and a shareable result card.
AI API Token & LLM Cost Calculator
Calculate and compare API costs for OpenAI GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, and open-source models based on token usage.
AI Background Remover - Remove Background from Image Online Free
Instantly remove background from any image with our AI background remover. Free, high-quality, and automatic. Perfect for e-commerce, portraits, and social media.
AI Content Detector & Perplexity Burstiness Matrix
Analyze text for AI generation markers (ChatGPT, GPT-4, Claude, Gemini) using sentence perplexity variance, burstiness distribution, and vocabulary repetition scoring
AI Face Crop Tool — Biometric Passport Centering Online Free
Instantly crop faces for passport, visa, and professional IDs. AI-powered centering ensures compliance with ICAO standards. 100% private.
AI Image Upscaler — Professional 4K/8K Neural Enlarger
The professional standard for upscaling logos, icons, and 4K wallpapers. Mathematical precision enlargement up to 4x without AI artifacts. Print-ready quality.
AI Metadata & EXIF Scrubber — Secure Privacy Shield
View and strip sensitive EXIF data, GPS locations, and camera info from your photos. Secure your digital identity with one-click metadata scrubbing. 100% private.
AI Object Remover — Clean Unwanted Objects Online
The professional standard for seamless content editing. Remove people, text, and distractions from your photos instantly with our Magic AI engine. Zero data retention.
AI Photo Restorer — Fix Blurry Photos & Enhance 4K
Breathe life into low-res photos with our AI Neural Reconstructor. Generates missing details, removes noise, and unblurs shots up to 4x. 100% private AI.
AI Prompt Generator
Select your use case and get a fully optimized prompt for ChatGPT, Claude, or any AI model — ready to copy and use instantly.
AI Tool Cost Calculator
Estimate your monthly AI tool costs based on your usage — across ChatGPT, Claude, Midjourney, and other popular services.
Airline Luggage Linear Inches Sizer
Calculate suitcase linear dimensions and check compliance with standard 62-inch airline baggage limits.
Alimony Estimator
Estimate spousal maintenance and alimony payments based on marriage length and income gap
Alimony Estimator
Get a realistic estimate of spousal support payments based on marriage length, income difference, and state — before you hire a lawyer.
Alphabetical Line Sorter
Sort lines of text alphabetically
Alt Tag Checker
Check images for missing alt attributes in HTML
Amazon FBA & 2D Pallet Shipping Label Generator
Generates standard 4×6″ thermal shipping carton labels for Amazon Seller Central FBA shipments. Features compliant Code 128 carton barcodes, 2D inventory matrix, and mandatory Team Lift warning badges.
Amazon KDP Book Cover & Spine Dimension Calculator
Calculate exact KDP spine thickness and full cover PDF dimensions based on page count and paper type to prevent Amazon KDP publishing rejection.
Anagram Solver
Instantly solve word scrambles, newspaper jumbles, and anagrams into valid English words.
Analog Synthesizer Envelope ADSR Millisecond Time Sizer
Client-side interactive engineering calculator for analog synthesizer envelope adsr millisecond time sizer. 100% private in-browser computation with zero server transit.
Analog Tape Flanging, Phasing & Comb Filter Frequency Sizer
Client-side interactive engineering calculator for analog tape flanging, phasing & comb filter frequency sizer. 100% private in-browser computation with zero server transit.
Anamorphic Cylindrical Mirror Art Un-Distorter
Transforms any photograph into an optical illusion anamorphic warp. The drawing appears wildly stretched on paper, but resolves into a crystal-clear original reflection when a cylindrical mirror is placed in the center.
Anamorphic Oval Bokeh Distortion & Blur Aspect Sizer
Client-side interactive engineering calculator for anamorphic oval bokeh distortion & blur aspect sizer. 100% private in-browser computation with zero server transit.
Annotate PDF
Document review workspace for highlighting text, underlining passages, and adding review notes to PDFs. Digital annotation tools are currently in active development.
App Store & Play Store 1024×1024 High-Res Icon Extractor
Download original master uncompressed 1024×1024 and 512×512 PNG app icons directly from Apple App Store and Google Play Store CDNs for mockups and reviews.
Apple .pages & .numbers Document Extractor
Extract internal vector PDF documents and high-resolution QuickLook image previews from Apple .pages, .numbers, and .keynote files on Windows without a Mac.
Appliance Electricity Cost Calculator
Calculate how much household appliances (AC, space heaters, computers, refrigerators) cost to run per month.
Appliance Electricity Cost Sizer
Calculate running electricity costs for space heaters, air conditioners, gaming PCs, and refrigerators.
Aquarium Heater Wattage Sizer Calculator
Calculate heater wattage requirements in freshwater and saltwater tanks based on room temperature delta and gallon volume.
Area Converter
Convert between area measurement units
Aspect Ratio & Resolution Scaler
Calculate scaled pixel dimensions while preserving aspect ratio for video editing, social media, and canvas design.
Aspect Ratio & Screen Resolution Calculator
Calculate matching dimensions, aspect ratios (16:9, 9:16, 21:9, 4:3, 2.39:1 Anamorphic), pixel counts, and scale factors for video editing and UI design.
Aspect Ratio & Screen Resolution Scaler Calculator
Calculate proportional dimensions for 16:9 (YouTube), 9:16 (TikTok & Reels), 4:3, 1:1, and 21:9 ultrawide video and image resolutions.
Astrophotography 500 Rule & NPF Sharp Exposure Time Sizer
Client-side interactive engineering calculator for astrophotography 500 rule & npf sharp exposure time sizer. 100% private in-browser computation with zero server transit.
Astrophotography Star Spike & Diffraction Spikes Simulator
Add realistic Newtonian 4-vane, 6-vane, or James Webb Space Telescope (JWST) 8-vane diffraction spikes to telescope and astrophotography images with authentic chromatic rainbow flare dispersion.
Atmospheric Air Refraction Optical Apparent Altitude Sizer
Client-side interactive engineering calculator for atmospheric air refraction optical apparent altitude sizer. 100% private in-browser computation with zero server transit.
Attorney Hourly Fee Split & Retainer Drawdown Balance Sizer
Client-side interactive engineering calculator for attorney hourly fee split & retainer drawdown balance sizer. 100% private in-browser computation with zero server transit.
Audio Cable Balanced XLR vs Unbalanced CMRR Noise Sizer
Client-side interactive engineering calculator for audio cable balanced xlr vs unbalanced cmrr noise sizer. 100% private in-browser computation with zero server transit.
Audio dB SPL Distance Attenuation & Inverse Square Law Sizer
Client-side interactive engineering calculator for audio db spl distance attenuation & inverse square law sizer. 100% private in-browser computation with zero server transit.
Audio Delay Time to Milliseconds & Reverb Pre-Delay Quantizer
Client-side interactive engineering calculator for audio delay time to milliseconds & reverb pre-delay quantizer. 100% private in-browser computation with zero server transit.
Audio Joiner Online
Merge multiple audio files and songs into a single continuous track in your browser.
Audio Pitch & Playback Speed Shifter
Shift audio pitch in semitones and adjust playback speed independently for music practice, slowed+reverb effects, or nightcore.
Audio Trimmer & Sound Waveform Cutter
Trim audio tracks with millisecond start/end markers, visual waveform preview, fade-in/fade-out curves, and instant WAV export.
Audio/Video Lip-Sync Latency Sizer
Fix out-of-sync audio and microphone delay in Premiere, DaVinci Resolve, OBS, and home theater receivers.
Audiobook & Podcast MP3 to Single M4B with Chapter Markers
Merge and package audio lectures and podcasts into standard Apple Books and Audible compatible .m4b audiobooks with embedded chapter markers and playback position memory.
Australia Passport Photo Maker — Official 35x45mm Online Sizer
Format and align portrait photos to Australian Passport Office 35x45mm specifications with in-browser canvas cropping and print grid sheets.
Auto Lease vs Purchase Sizer
Compare financial out-of-pocket costs between vehicle leasing and financing with equity retention analysis.
Auto Loan & Monthly Car Payment Calculator
Calculate monthly auto loan payments, sales tax, trade-in equity, total interest, and total vehicle cost across loan terms
Automotive OBD-II DTC Fault Code & Freeze-Frame Interpreter
Decode generic (P0xxx) and manufacturer-specific (P1xxx, C, B, U) OBD-II trouble codes with live freeze-frame fuel trim analysis, symptoms, root causes, and step-by-step DIY repair checklists.
Avery & Sheet Label Grid Alignment Calibrator (PDF)
Fix annoying printer feed drift on Avery 5160, 5163, and round sticker sheets. Measure physical paper shift in millimeters, enter X/Y offsets, and generate perfectly centered print-ready PDFs.
BAC & Sobriety Timeline Sizer
Calculate blood alcohol concentration and metabolic clearance hours using the Widmark formula.
Backdoor Roth IRA Pro-Rata Tax Sizer
Calculate the taxable vs non-taxable ratio on Backdoor Roth IRA conversions under IRS Form 8606 pro-rata rules.
Background Remover
Remove background from images
Backlink Anchor Text Analyzer
Analyze anchor text distribution in HTML content
Backslash Escape & Unescape
Escape or unescape backslash characters in strings
Baking Pan Size & Recipe Scaling Calculator
Convert and scale baking recipe ingredient volumes and surface areas between round cake pans, square tins, springforms, and 9x13 dishes.
Baking Recipe Scaler & Servings Multiplier
Scale baking recipes up or down by serving multiplier to bake larger or smaller batches with precise proportions.
Ball Bearing L10 Life Hours & Equivalent Dynamic Load Sizer
Client-side interactive engineering calculator for ball bearing l10 life hours & equivalent dynamic load sizer. 100% private in-browser computation with zero server transit.
Bandsaw Blade Teeth Per Inch (TPI) & Cutting Speed Sizer
Client-side interactive engineering calculator for bandsaw blade teeth per inch (tpi) & cutting speed sizer. 100% private in-browser computation with zero server transit.
Bandwidth & File Download Time Calculator
Calculate how long it takes to download games, videos, or ISO files across various internet broadband speeds.
Bank Cheque / Check MICR E-13B Optical Decoder
Extract Routing Transit Number, Account Number, and Check Serial Number from the bottom magnetic ink character recognition (MICR) band of scanned checks.
Barcode Generator (PNG & SVG)
Generate high-resolution printable barcodes supporting Code 128, EAN-13, and UPC-A standards.
Basal Metabolic Rate (BMR) Calculator
Calculate your exact Basal Metabolic Rate (BMR) using both the Mifflin-St Jeor and Harris-Benedict clinical formulas.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 to text
Base64 Image Data URI Encoder & CSS Exporter
Convert PNG, JPG, and SVG images into optimized Data URIs with HTML <img>, CSS background-image, and raw base64 copy options.
Base64 to Image
Convert Base64 strings back to images
Baseboard & Trim Molding Linear Sizer
Calculate linear footage of baseboard, crown molding, and shoe molding with automatic miter cut waste.
Bass Trap Membrane Resonance Frequency & Depth Sizer
Client-side interactive engineering calculator for bass trap membrane resonance frequency & depth sizer. 100% private in-browser computation with zero server transit.
Battery C-Rate to Continuous Discharge Current & Run Time Sizer
Client-side interactive engineering calculator for battery c-rate to continuous discharge current & run time sizer. 100% private in-browser computation with zero server transit.
Battery Peukert Law Discharge Capacity & Runtime Calculator
Client-side interactive engineering calculator for battery peukert law discharge capacity & runtime calculator. 100% private in-browser computation with zero server transit.
Bayes’ Theorem Posterior Probability Sizer
Calculate Bayesian posterior probability updates for medical testing, machine learning classification, and fraud detection.
BBQ Meat Smoking Time & Temp Sizer
Estimate pit hours, stall wrap milestones, and internal doneness temperatures for brisket, pork shoulder, ribs, and poultry.
Bcrypt & Argon2 Password Hash Playground
Hash passwords and verify candidate strings using Bcrypt work factors and Argon2 cost parameters with benchmark execution timing.
Bcrypt Hash Generator
Generate bcrypt password hashes
Binary Arithmetic & Bitwise Calculator
Perform arithmetic addition, subtraction, multiplication, and bitwise logic operations on binary bitstrings.
Binary to Text
Convert binary data back to text
Biomass Pellet & Firewood Cord Heating BTU Equivalency Sizer
Client-side interactive engineering calculator for biomass pellet & firewood cord heating btu equivalency sizer. 100% private in-browser computation with zero server transit.
Birthday Card Maker
Create heartfelt personalized birthday greeting cards with photos, festive themes, and printable PDF.
Birthday Wishes Generator
Generate personalized heartfelt, funny, or professional birthday messages crafted for friends, family, and coworkers.
Blood Alcohol Content (BAC) Calculator
Calculate Blood Alcohol Concentration (BAC) and estimated time to reach 0.00% sobriety using the Widmark formula.
Bluebeam-Style PDF Vector Measurement Calibrator
Calibrate scale on architectural blueprints and floorplans without Bluebeam Revu software. Measure linear wall lengths and room square footage interactively.
Blur Faces in Photos Online Free — AI Privacy & GDPR Studio
Protect identities instantly. Automatically detect and blur faces in photos online for free. Use neural AI to obscure faces with blur, pixelation, or emojis. 100% private.
Blur Sensitive Info in Image Online — Privacy Protection
Protect your privacy by blurring faces, license plates, and sensitive data. Professional-grade obscuration that runs entirely on your device. 100% private.
BMI & Health Risk Calculator
Calculate your BMI and get a full health risk assessment — including cardiovascular risk, weight category context, and what the number really means.
BMI Calculator
Calculate Body Mass Index from height and weight
Boat & Marine Loan Financing Calculator
Calculate monthly payments and total financing costs for new or pre-owned boats, yachts, and personal watercraft across standard marine loan durations from 5 to 20 years.
Body Fat Percentage Calculator (US Navy Method)
Calculate body fat percentage using the validated US Navy tape measure method with neck, waist, hip, and height dimensions.
Body Type & Shape Calculator
Calculate your Waist-to-Hip Ratio (WHR) and discover whether your silhouette matches an Hourglass, Rectangle, Pear, or Apple profile.
Bolt Tightening Torque & Preload Tension (Dry vs Lubricated)
Client-side interactive engineering calculator for bolt tightening torque & preload tension (dry vs lubricated). 100% private in-browser computation with zero server transit.
Bond Yield to Maturity (YTM) Calculator
Determine bond Yield to Maturity (YTM), annual coupon cash flow, and market discount or premium pricing based on par value, price, and coupon rate.
Border Radius Generator
Generate CSS border-radius properties
Box Shadow Generator
Generate CSS box-shadow properties visually
Box-and-Whisker Plot & Outlier Calculator
Calculate five-number summary (Min, Q1, Median, Q3, Max), Interquartile Range (IQR), and detect mild and extreme mathematical outliers.
BPM Tap Tempo & Delay Time Calculator
Tap tempo to calculate Beats Per Minute in real time. Automatically compute delay milliseconds, reverb pre-delay times, and LFO Hz sync.
BPM Tap Tempo & Metronome Counter
Tap any key or click rhythmically to detect the exact Beats Per Minute (BPM) of songs with millisecond interval variance and metronome.
Bra Size & Cup Measurement Calculator
Calculate accurate bra band and cup sizes based on snug underbust and standing bust measurements.
Braille Grade-1 & Grade-2 Tactile PDF Embosser & Stencil Maker
Generates calibrated 1:1 physical scale Braille documents (UEB standard 2.34mm dot spacing) for swell-form paper or slate & stylus embossing. Features reverse mirror mode and visual letter guides.
Braking Stopping Distance & Deceleration Rate Calculator
Client-side interactive engineering calculator for braking stopping distance & deceleration rate calculator. 100% private in-browser computation with zero server transit.
Brazil Passport Photo Maker — Official 5x7cm & Foto 3x4 Sizer
Format Brazilian passport (5x7cm) and identity (3x4cm) photos online to Polícia Federal standards directly in your web browser.
Break-Even Sales & Unit Volume Calculator
Calculate unit sales volume and monthly gross revenue required to break even based on recurring fixed expenses and per-item variable costs.
Break-Even Sales Volume Sizer
Determine the exact physical unit inventory clearance required to reach profitability based on baseline company overhead and unit margin economics.
Brick & Cinder Block Sizer
Calculate brick or CMU cinder block counts, mortar mix bags, and masonry sand for garden and foundation walls.
Brick, Paver & Mortar Joint Masonry Calculator
Client-side interactive engineering calculator for brick, paver & mortar joint masonry calculator. 100% private in-browser computation with zero server transit.
Broaching Force & Keyway Depth Tooth Load Sizer
Client-side interactive engineering calculator for broaching force & keyway depth tooth load sizer. 100% private in-browser computation with zero server transit.
Broadcast Safe Video Legal IRE Gamut & Clipping Checker
Client-side interactive engineering calculator for broadcast safe video legal ire gamut & clipping checker. 100% private in-browser computation with zero server transit.
Broken Link Checker
Find broken links in HTML content
Broken Link Finder
Scan a page for broken links
BRRRR Deal Equity & Refinance Sizer
Calculate cash-out refinance capital recovery and retained equity for Buy, Rehab, Rent, Refinance, and Repeat (BRRRR) real estate deals.
Business Card Maker
Design front and back business cards with custom palettes, contact details, and 300 DPI print PDF.
Business Name Generator
Generate catchy, brandable business and startup name ideas filtered by industry and naming style.
Business Valuation Calculator
Estimate business enterprise value using revenue and EBITDA multiples
Business Valuation Calculator
Estimate what your business is worth using revenue multiples, profit multiples, and asset-based methods — with a range and confidence indicator.
Butter Converter & Sticks to Grams Matrix
Instant multi-way converter between US butter sticks, cups, tablespoons, grams, and ounces with salted vs unsalted butter conversion guidelines
CAD .dxf Vector Blueprint Viewer & PDF Exporter
View and inspect architectural .dxf CAD blueprints and floorplans client-side without a $2,000/year AutoCAD license or uploading files to remote servers.
Caffeine Half-Life & Sleep Clearance Calculator
Calculate caffeine clearance curves based on beverage milligrams, half-life decay, and target bedtime.
Caffeine Half-Life & Sleep Disruption Calculator
Track blood caffeine concentration over time, metabolic decay half-life, and calculate your evening sleep cutoff hour.
California Statute of Limitations
California personal injury deadline (2 yrs under Cal. Civ. Proc. Code § 335.1) and contract deadlines.
Calories Burned by Activity Calculator
Calculate calories burned during workouts based on exercise type, intensity, duration, and body weight.
Camera Crop Factor & Field-of-View Sizer
Calculate equivalent focal length and depth-of-field for APS-C, Micro Four Thirds, and 1-inch camera sensors.
Camera Lens Macro Magnification Reproduction Ratio Sizer
Client-side interactive engineering calculator for camera lens macro magnification reproduction ratio sizer. 100% private in-browser computation with zero server transit.
Camera Sensor Crop Factor & 35mm Equivalent Focal Length Sizer
Client-side interactive engineering calculator for camera sensor crop factor & 35mm equivalent focal length sizer. 100% private in-browser computation with zero server transit.
Canada Passport Photo Maker — Official 50x70mm Online Sizer
Format portrait photos to official Canadian Passport Program and IRCC 50x70mm specifications directly in your browser with alignment guides.
Candle Wax & Fragrance Load Sizer
Calculate wax and fragrance oil weights in grams and ounces based on candle vessel liquid volume.
Canonical Tag Checker
Validate canonical tags in HTML
Car Insurance Estimator
Estimate target car insurance premiums based on vehicle, coverage, and driving history
Car Insurance Estimator
Insurers use secret zip-code data to price your risk. Use our 2026 adversarial estimator to find your target premium without giving away your phone number.
Car Lease Payment Calculator
Calculate monthly car lease payments by breaking down depreciation, lease finance charges, sales tax, and residual value.
Car Lease vs. Buy Financial Decision Engine
Compare 5-year Total Cost of Ownership (TCO) between leasing vs buying a new car, analyzing depreciation, loan interest, lease money factor, and residual equity.
Carbon Footprint Calculator
Calculate your personal carbon footprint from travel, diet, home energy, and purchases — with clear steps to reduce it.
Carpet Roll & Padding Estimator
Calculate broadloom carpet roll yards, seam drops, and carpet cushion underlayment rolls.
Cascaded RF Noise Figure & Friis Amplifier Sensitivity Sizer
Client-side interactive engineering calculator for cascaded rf noise figure & friis amplifier sensitivity sizer. 100% private in-browser computation with zero server transit.
Case Converter
Convert text between uppercase, lowercase, title case, and more
Cassette Tape & VHS J-Card Printable Origami Layout
Generates calibrated 300 DPI audio cassette J-Card and VHS case inserts with exact crease fold lines, rotated spine typography, tracklist panels, and print trim guides.
Cat Age in Human Years Calculator
Calculate your cat's biological age in human years based on AAFP veterinary aging standards.
Cat Age to Human Years Calculator (AAHA Life Stages)
Convert feline chronological age to equivalent human years according to the American Animal Hospital Association guidelines.
CCTV & Fisheye Lens Defisher
Defish curved wide-angle photos from dashcams, GoPro, security cameras, and video doorbells into straight architectural perspectives.
Ceiling Fan CFM & Blade Span Sizer
Calculate recommended ceiling fan blade span and airflow CFM based on room square footage and ceiling height.
Celestial Coordinates RA / Dec to Local Altitude / Azimuth Sizer
Client-side interactive engineering calculator for celestial coordinates ra / dec to local altitude / azimuth sizer. 100% private in-browser computation with zero server transit.
Centrifugal Blower Fan Affinity Laws Performance Sizer
Client-side interactive engineering calculator for centrifugal blower fan affinity laws performance sizer. 100% private in-browser computation with zero server transit.
Centrifugal Well Pump Total Dynamic Head (TDH) Sizer
Client-side interactive engineering calculator for centrifugal well pump total dynamic head (tdh) sizer. 100% private in-browser computation with zero server transit.
Certificate Generator
Create elegant award, completion, and recognition certificates ready for high-resolution PDF print.
Certificate of Deposit (CD) Calculator
Calculate interest earned on bank certificates of deposit (CD) with monthly compounding and APY.
Change Background to Blue for Passport Photo Online Free
Convert your background to solid blue for Malaysian, Kuwaiti, or specific ID documents. 100% private and biometric-ready.
Change Background to White for Passport Photo Online Free
Instantly add a plain white background to your ID or passport photo. 100% compliant for US, India, UK, and Schengen visas. Zero server uploads.
Character Encoder (UTF-8/ASCII)
Encode characters to UTF-8, ASCII, or Unicode code points
Child Support Calculator
Estimate monthly child support payments based on income and custody share
Child Support Calculator
Estimate monthly child support payments based on income, custody percentage, and state guidelines — for both paying and receiving parents.
China Passport Photo Maker — Official 33x48mm Online Studio
Format compliant 33x48mm photos for Chinese passport and consular visa applications. In-browser alignment with optional ephemeral cloud background removal.
Chroma Key Green Screen Bleed Spill Subtractor & Clean Mattes
Client-side interactive engineering calculator for chroma key green screen bleed spill subtractor & clean mattes. 100% private in-browser computation with zero server transit.
Chroma Key Green Screen Transparency Remover
Remove solid green or blue background screens from images client-side with adjustable similarity thresholds and edge smoothing.
Chroma Subsampling (4:4:4 vs 4:2:2 vs 4:2:0) Visualizer & Cleaner
Diagnose why red text, HUD graphics, and saturated UI icons look blurry over HDMI or in video captures. Visually inspect YCbCr luma/chroma decomposition and simulate YouTube/H.264 color loss.
Cinema Anamorphic Lens Aspect Ratio De-Squeeze Sizer
Client-side interactive engineering calculator for cinema anamorphic lens aspect ratio de-squeeze sizer. 100% private in-browser computation with zero server transit.
Cinematography Shutter Angle to Shutter Speed Exposure Sizer
Client-side interactive engineering calculator for cinematography shutter angle to shutter speed exposure sizer. 100% private in-browser computation with zero server transit.
Circle Area, Circumference & Diameter Calculator
Calculate circle metrics instantly. Input either radius, diameter, circumference, or area to compute all other dimensions.
Civil Litigation Discovery Response Deadline & Holiday Calendar
Client-side interactive engineering calculator for civil litigation discovery response deadline & holiday calendar. 100% private in-browser computation with zero server transit.
Clean Reader Mode & Ad-Free PDF
Strip ads, trackers, and clutter from articles and format them into beautiful, printable ad-free PDFs
Closing Costs Calculator
Itemized breakdown of lender fees, title insurance, transfer taxes, and cash to close
Closing Costs Calculator
Estimate your total closing costs before you sign — broken down by lender fees, title fees, prepaid items, and state-specific charges.
cm to Inches Converter
Convert centimeters to inches with fraction equivalents, feet breakdown, and conversion formula tables.
CMYK & HEX to Closest Pantone (PMS) Spot-Color Matcher
Calculate the closest official coated Pantone spot-color code (PMS) and print formula for any HEX or CMYK color using Delta-E Euclidean color distance.
CNC Router & Mill Feeds & Speeds Chip Load Optimizer
Calculate optimal spindle RPM, surface feet per minute (SFM), feed rate (IPM and mm/min), and chip load per tooth across aluminum, hardwood, plywood, acrylic, and brass to prevent tool deflection.
Coaxial Cable Characteristic Impedance & Velocity Sizer
Client-side interactive engineering calculator for coaxial cable characteristic impedance & velocity sizer. 100% private in-browser computation with zero server transit.
Coaxial Quarter-Wave Stub Notch Filter Calculator
Calculate coaxial quarter-wave and half-wave transmission line stub dimensions and notch filter frequencies for RF attenuation.
Code Diff Checker
Compare two code snippets and highlight differences
Code Diff Checker & Visual Text Comparator
Compare code snippets, JSON files, configuration files, and plain text side-by-side or unified with character-level difference highlighting.
Coffee-to-Water Brew Ratio Sizer
Calculate coffee dosing and brewing water weight for golden cup standard extraction ratios.
Coin Flip
Flip a fair virtual coin with 3D animation, probability distribution stats, and multi-flip Monte Carlo simulations.
College & High School GPA Calculator
Calculate semester and cumulative grade point average (GPA) on a 4.0 scale with weighted course credits and honors tracking
College Tuition & Savings Calculator
Forecast the future cost of college tuition and calculate required monthly 529 college savings to graduate debt-free.
Color Blindness Simulator & WCAG Auditor
Simulate Deuteranopia, Protanopia, Tritanopia, and Achromatopsia on uploaded images with real-time WCAG 2.1 AA/AAA contrast evaluation.
Color Contrast Checker
Evaluate WCAG 2.1 AA and AAA color contrast ratios between text and background with live visual preview.
Color Name Finder
Find the closest named color for any hex value
Color Palette Generator
Generate beautiful color palettes
Color Picker
Pick and explore colors with HEX, RGB, and HSL values
Color Temperature Mired Shift & Gel Filter Calculator
Client-side interactive engineering calculator for color temperature mired shift & gel filter calculator. 100% private in-browser computation with zero server transit.
Commercial Cap Rate & NOI Sizer
Calculate real estate capitalization rate (Cap Rate) and annual Net Operating Income for commercial and multi-family deals.
Compound Annual Growth Rate (CAGR) Calculator
Calculate Compound Annual Growth Rate (CAGR) between starting and ending values across multi-year holding periods.
Compound Interest & Daily Reinvestment Calculator
Simulate exponential wealth compounding with daily, monthly, or annual reinvestment intervals and regular monthly savings contributions.
Compound Interest Calculator
Calculate compound interest over time
Compound Miter Saw Blade Bevel & Angle Crown Molding Sizer
Client-side interactive engineering calculator for compound miter saw blade bevel & angle crown molding sizer. 100% private in-browser computation with zero server transit.
Compress PDF
Compress PDF documents by removing redundant metadata dictionaries and repacking cross-reference tables into object streams. Processes locally in your browser with zero server uploads.
Compress PDF to 100KB
Compress and reduce PDF file size to exactly under 100KB for official portals.
Compress PDF to 1MB
Compress and reduce PDF file size to exactly under 1MB for official portals.
Compress PDF to 200KB
Compress and reduce PDF file size to exactly under 200KB for official portals.
Compress PDF to 2MB
Compress and reduce PDF file size to exactly under 2MB for official portals.
Compress PDF to 300KB
Compress and reduce PDF file size to exactly under 300KB for official portals.
Compress PDF to 500KB
Compress and reduce PDF file size to exactly under 500KB for official portals.
Compress Video Online
Reduce MP4 and WebM video file size in your browser with balanced presets or custom target MB limits.
Compressed Air Pneumatic Pipe Sizing & Pressure Drop Calculator
Client-side interactive engineering calculator for compressed air pneumatic pipe sizing & pressure drop calculator. 100% private in-browser computation with zero server transit.
Conception Date Calculator
Reverse calculate your probable conception date, 6-day fertile window, and estimated last menstrual period based on an ultrasound or delivery due date.
Concrete Footing & Sonotube Cylinder Calculator
Calculate concrete volume in cubic yards and 60lb/80lb bag counts for cylindrical deck post footings, foundation piers, and circular forms.
Concrete Slab & Footing Calculator
Calculate the exact volume of concrete needed in cubic yards and pre-mix bags with waste margins.
Concrete Slab, Footing & Column Volume in Cubic Yards Calculator
Client-side interactive engineering calculator for concrete slab, footing & column volume in cubic yards calculator. 100% private in-browser computation with zero server transit.
Concrete Water-to-Cement Ratio Sizer
Calculate water volume in quarts and gallons per bag of concrete mix to maintain proper hydration without compromising compressive strength.
Confidence Interval (CI) Calculator
Calculate confidence interval boundaries and margin of error for a sample mean using standard normal z-distribution critical values.
Contrast Ratio Checker
Check WCAG contrast ratios for accessibility
Cooking & Kitchen Measurement Converter
Convert recipe volume and weight measurements across Imperial and Metric culinary units.
Coplanar Waveguide (CPW) Grounded Transmission Line Sizer
Client-side interactive engineering calculator for coplanar waveguide (cpw) grounded transmission line sizer. 100% private in-browser computation with zero server transit.
Corrupted JPEG & PNG Header Repairer
Repair broken image magic bytes, corrupted JFIF/PNG headers, and truncated EOF streams 100% in your browser without sketchy software.
CORS Header Generator & Config Builder
Visual CORS policy generator for NGINX, Express.js, Cloudflare Workers, and Apache. Prevent browser preflight errors and configure caching.
Countdown Timer
Set live digital countdown clocks for product launches, milestones, weddings, or exams with realtime seconds.
Counterflow Heat Exchanger LMTD Temperature Sizer
Client-side interactive engineering calculator for counterflow heat exchanger lmtd temperature sizer. 100% private in-browser computation with zero server transit.
Course Grade & Final Exam Calculator
Calculate your current course grade and determine the exact score needed on your final exam to secure your desired letter grade
Cover Letter Generator
Generate tailored professional job application letters with role customization and instant PDF export.
CPS Click Speed & Jitter Counter
Test your mouse clicking speed over a 5-second trial with real-time click tally and average clicks per second (CPS) score.
Creatine Monohydrate Sizer
Calculate daily creatine monohydrate loading saturation dosages and long-term maintenance based on body mass.
Credit Card Payoff Calculator
Calculate payoff timeline and interest saved with accelerated payments
Credit Card Payoff Calculator
Escape the minimum payment trap. Discover the exact day you'll be debt-free and see how the 'Rule of Three' can slash years off your repayment timeline.
Cricut & Silhouette Multi-Color Vinyl Layer SVG Separator
Separate multi-colored sticker graphics and artwork into individual single-color SVG cut layers with corner alignment registration crosshairs for Cricut and Silhouette vinyl cutting.
Cron Expression Parser
Parse and explain cron schedule expressions
Crontab Schedule Humanizer
Convert numeric crontab schedule fields into clear English descriptions and verify yearly execution frequencies.
Crop PDF
Document inspection workspace for reviewing PDF page dimensions and margin boundaries. Interactive visual box-cropping tool is currently in active development.
Crypto Dollar-Cost Averaging (DCA) Calculator
Simulate recurring cryptocurrency purchases to measure portfolio accumulation and dollar-cost averaging growth over time.
Crypto Profit Calculator
Calculate cryptocurrency profit, loss, ROI percentage, and exchange fee slippage across buy and sell legs.
CSS Flexbox & Grid Playground
Interactive visual design studio for CSS Flexbox, Grid layouts, Box Shadows, and Glassmorphism with real-time CSS code generator
CSS Flexbox & Grid Visual Sandbox
Interactive playground for CSS Flexbox and 2D Grid layouts with responsive drag handles, align/justify controls, and CSS export.
CSS Formatter
Beautify and format CSS code with proper indentation
CSS Gradient Generator
Create CSS linear and radial gradients
CSS Grid Generator
Generate CSS Grid layouts visually
CSS Minifier
Minify CSS by removing comments and whitespace
CSS Sprite Sheet Packer & Atlas Generator
Pack multiple PNG/SVG icons into an optimized 2D texture atlas with generated CSS background-position rules and image download.
CSV to JSON
Convert CSV data to JSON format
CSV to XML
Convert CSV data to XML format
Cups to Grams Baking & Ingredient Density Converter
Convert US cups to grams accurately based on real ingredient density for flour, white sugar, brown sugar, butter, and rolled oats.
cURL to Code Converter (Python, Node.js Fetch, Go, Rust)
Convert shell cURL command lines into production-ready API client code in Python requests, Node fetch, Go net/http, and Rust reqwest.
cURL to Multi-Language Code Converter
Transform raw cURL terminal commands into production-grade JavaScript Fetch, Axios, Python Requests, Go, and PHP snippets.
Currency Converter
Convert between world currencies
Currency Converter (Offline Cached Rates)
Convert between USD, EUR, GBP, JPY, CAD, AUD, and 160+ fiat currencies with offline cached fallback exchange rates for traveler utility.
Custom SVG QR Code Studio & Logo Embedder
Generate custom SVG QR codes with custom dots, eye styles, logo overlays, gradient color fills, and scalable vector downloads.
Cyanotype & Sun-Print Digital Negative Curve Linearizer
Calibrates and inverts digital photographs into transparent contact negatives for alternative darkroom processes (Cyanotype, Van Dyke Brown, Platinum). Includes UV-blocking ink masks and a 21-step exposure test wedge.
Daily Calorie, TDEE & Macro Calculator
Calculate your Basal Metabolic Rate (BMR), Total Daily Energy Expenditure (TDEE), and target caloric intake for weight loss or muscle gain
Daily Protein Requirement Calculator
Calculate evidence-based daily protein requirements based on body weight, training intensity, and athletic goals.
Daily Water Intake & Hydration Calculator
Calculate baseline daily water intake in liters, fluid ounces, and standard eight-ounce glasses, with adjustments for daily workout duration and warm or arid environments.
Daily Water Intake & Hydration Formula
Calculate your optimal daily water intake in liters and ounces based on body weight, exercise intensity, climate humidity, and caffeine consumption.
Daily Water Intake Sizer
Calculate daily fluid hydration requirements customized for body mass, workout intensity, and climate.
Date Difference & Duration Calculator
Calculate exact elapsed days, calendar months, and working business days between any two dates.
Date Difference Calculator
Calculate the difference between two dates
Days Between Dates
Calculate total calendar days, business days, and weekend days between any two dates with full duration breakdowns.
DC Wire Gauge (AWG) Voltage Drop & Solar Wire Sizer
Calculate DC wire gauge AWG sizes, voltage drop percentage, and power loss for 12V, 24V, and 48V off-grid solar and automotive battery banks.
Dead & Stuck Pixel Fullscreen Screen Tester
Fullscreen pure RGB, CMYK, and high-contrast color flasher to detect dead, hot, and stuck pixels on desktop and mobile displays.
Dead Pixel Test
Inspect LCD and OLED monitors for dead, stuck, or hot pixels across fullscreen solid color slides.
Debt Payoff Calculator
Compare Debt Avalanche vs. Debt Snowball repayment strategies with interest charts
Debt Payoff Calculator
The definitive tool for debt elimination. Compare Avalanche vs. Snowball methods with precision math to find your absolute fastest route to a $0.00 balance.
Debt Snowball vs. Avalanche Payoff Strategy Engine
Compare the Debt Avalanche method (highest interest rate first for interest savings) against the Debt Snowball method (lowest balance first for behavioral milestones).
Decibel Voltage (dBu / dBV) to RMS Volts Audio Converter
Client-side interactive engineering calculator for decibel voltage (dbu / dbv) to rms volts audio converter. 100% private in-browser computation with zero server transit.
Decision Maker
Resolve dilemmas and overcome choice fatigue with instant recommendations, confidence scores, and rationales.
Deck Framing & Board Sizer
Calculate dimensional joists, deck surface boards, and screw fasteners based on on-center spacing.
Deck Stair Stringer Rise & Run Sizer
Calculate deck stair riser heights, tread run depths, and stringer 2x12 lumber lengths conforming to IRC building codes.
Deep Cycle Battery & Inverter Sizer
Calculate how long a 12V or 24V AGM/Lithium battery bank will run your household AC appliances through an inverter.
Defined Benefit Pension Calculator
Estimate your annual and monthly pension payout using service years, multiplier, and final average salary.
Delete PDF Pages
Click to select and delete blank sheets, outdated clauses, or unwanted pages from your PDF document. Generates visual page thumbnails and recompiles locally using pdf-lib.
Delimiter & Column Surgery Studio
Swap columns, extract specific columns, change delimiters (CSV, TSV, Pipe, Semicolon), transpose matrices, and clean lines client-side
Deposition Transcript Word Count & Video Runtime Sizer
Client-side interactive engineering calculator for deposition transcript word count & video runtime sizer. 100% private in-browser computation with zero server transit.
Developer Cheat Sheets (Git, Docker, Linux, HTTP, SQL)
Search-as-you-type quick reference cards for Git, Docker, Linux, HTTP status codes, and SQL with one-click clipboard copying.
Device Mockup Generator
Wrap screenshots in realistic iPhone, MacBook laptop, and tablet mockups with transparent PNG export.
Diagonal Invoice & Legal PDF Status Stamper
Apply official diagonal vector stamps (PAID, VOID, CONFIDENTIAL, DRAFT) across all pages of invoices and legal contracts without Adobe Acrobat fees.
Dice Roller
Roll virtual polyhedral dice including d4, d6, d8, d10, d12, d20, and d100 with automatic sum calculations.
Differential Pressure Orifice Plate & Flow Rate Calculator
Client-side interactive engineering calculator for differential pressure orifice plate & flow rate calculator. 100% private in-browser computation with zero server transit.
Digital Evidence Chain of Custody Audit Ledger & Hash Sizer
Client-side interactive engineering calculator for digital evidence chain of custody audit ledger & hash sizer. 100% private in-browser computation with zero server transit.
Discount & Sales Tax Calculator
Calculate final checkout total after promotional percent discounts and municipal sales tax additions.
Discount Calculator
Calculate discounts and savings
Divorce Cost Estimator
Estimate total divorce costs by state, contested vs uncontested, and mediation
Divorce Cost Estimator
Estimate the total cost of a divorce based on your state, complexity level, and whether you plan to use an attorney or mediation.
DMX-512 Stage Lighting Universe Channel & Dip Switch Sizer
Client-side interactive engineering calculator for dmx-512 stage lighting universe channel & dip switch sizer. 100% private in-browser computation with zero server transit.
DNS Lookup
Look up DNS records for any domain
Docker Compose Container Sizer
Calculate and generate production Docker Compose service blocks with port exposure and volume bindings.
Dog Age in Human Years Calculator
Calculate your dog's true age in human years based on size breed category (Small, Medium, Large, Giant).
Dog Age to Human Years Calculator (Epigenetic Clock)
Calculate your dog’s true biological age in human years using the modern UCSD epigenetic DNA methylation formula and breed size tiers.
Domain Age Checker
Check when a domain was first registered
Draw on PDF
Document viewer workspace for inspecting PDF pages before freehand sketching. Interactive vector pen markup controls are currently in active development.
Drill Tap Size & Thread Percentage Sizer (Metric & Imperial)
Client-side interactive engineering calculator for drill tap size & thread percentage sizer (metric & imperial). 100% private in-browser computation with zero server transit.
Driving License Photo Maker — Official ID Size Online Studio
Create driving license photos online. Official sizes, solid backgrounds, and biometric compliance. 100% private.
Drug Interaction Checker
Check potential interactions and adverse warnings between medications
Drug Interaction Checker
Check whether two or more medications interact with each other — using open FDA data — before combining prescriptions.
Drywall Sheet & Joint Compound Calculator
Calculate drywall panels (4x8 or 4x12), mud buckets, and drywall screws needed for walls and ceilings.
Drywall Sheet & Screws Sizer
Estimate drywall sheets, screws, and tape for residential and commercial walls and ceilings.
Drywall Sheet Count & Joint Compound Estimating Calculator
Client-side interactive engineering calculator for drywall sheet count & joint compound estimating calculator. 100% private in-browser computation with zero server transit.
Duplicate Content Checker
Compare two texts for duplicate content
Duplicate Line Remover
Remove duplicate lines from text
Dynamic Range Crest Factor to RMS Headroom Meter
Client-side interactive engineering calculator for dynamic range crest factor to rms headroom meter. 100% private in-browser computation with zero server transit.
E-Commerce & Payment Gateway Fee Calculator
Calculate net profit margins after platform listing fees, transaction cuts, and Stripe/PayPal payment gateway processing fees.
E-Ink & Kindle Custom Manga & Comic Contrast Curve Optimizer
Pre-processes manga, webtoons, and graphic novels for E-Ink screens (Kindle, Kobo, Boox) by expanding gamma, eliminating washed-out grays, and sharpening ink lines.
eBay Seller Fee & Profit Calculator
Calculate eBay Final Value Fees (13.25%), optional promoted listing ad rates, payment processing, and net profit margins.
EBU R128 / ITU BS.1770 Broadcast LUFS & True-Peak Audio Meter
Inspect audio files for Integrated LUFS, Loudness Range (LRA), and True-Peak (dBTP) headroom client-side via Web Audio API. Provides target compliance offsets for Spotify, Apple Music, and TV Broadcast.
Edit PDF Online
Add text, date stamps, and signature marks to existing PDF files without cloud uploads.
EIRP & Effective Radiated Power ERP Transmitter Sizer
Client-side interactive engineering calculator for eirp & effective radiated power erp transmitter sizer. 100% private in-browser computation with zero server transit.
Electric Vehicle (EV) Charging Cost Calculator
Calculate EV charging cost per full charge, cost per mile, and compare savings against gasoline vehicles.
Electric Vehicle (EV) vs. Gas Fuel Cost Calculator
Compare annual fueling expenses between charging an Electric Vehicle (Tesla, Rivian, Hyundai) vs. driving a gasoline car.
Electronic Heat Sink Thermal Resistance (C/W) Calculator
Client-side interactive engineering calculator for electronic heat sink thermal resistance (c/w) calculator. 100% private in-browser computation with zero server transit.
Embedded PDF Font Inspector & Extractor
Inspect and extract embedded TrueType and OpenType fonts from PDF documents directly in browser memory without Adobe software.
Emoji Clipboard Picker & Unicode Code Inspector
1-click copy for trending emojis, Heart colors (Red, Pink, White, Purple), aesthetic symbols, Unicode code points, HTML entities, and Discord/Slack shortcodes with live clipboard string builder
Employee True Cost Calculator
Find out what an employee actually costs beyond their salary — including payroll taxes, benefits, insurance, and overhead — for any US state.
Engine Bore & Stroke Sizer
Calculate engine displacement size by cylinder bore, crankshaft stroke, and cylinder count.
Engine Bore, Stroke, Displacement & Static Compression Ratio Sizer
Client-side interactive engineering calculator for engine bore, stroke, displacement & static compression ratio sizer. 100% private in-browser computation with zero server transit.
Engine Dyno SAE J1349 Atmospheric Correction Factor Calculator
Client-side interactive engineering calculator for engine dyno sae j1349 atmospheric correction factor calculator. 100% private in-browser computation with zero server transit.
Engine Valve Spring Seat Pressure & Coil Bind Sizer
Client-side interactive engineering calculator for engine valve spring seat pressure & coil bind sizer. 100% private in-browser computation with zero server transit.
Ephemeral Self-Destructing Secret Link Generator
Client-side encrypted one-time secret links with AES-256-GCM. Decryption keys live exclusively in the URL fragment (#).
Epoch Unix Timestamp Converter & Timezone Matrix
Convert Unix seconds, milliseconds, microseconds, and nanoseconds across all global timezones with live relative clock ticker.
Epoxy Resin Mix Sizer
Calculate two-part epoxy resin volumes for river tables, deep pours, jewelry molds, and countertop coatings.
Equal Loudness ISO 226 Phon to dB SPL Contour Visualizer
Client-side interactive engineering calculator for equal loudness iso 226 phon to db spl contour visualizer. 100% private in-browser computation with zero server transit.
ESC/POS Thermal Receipt Dot-Matrix Bytecode Generator
Design and test itemized thermal receipts for Epson TM-T88, Star, MUNBYN and generic POS printers. Generates pure raw binary bytecode (.bin), Hex stream, and Python/Arduino drivers.
Estate Tax & Inheritance Exemption Calculator
Calculate federal estate tax liability based on gross taxable estate net worth and the unified lifetime gift exemption.
Eurorack 1V/Octave CV Voltage Divider & Attenuator
Calculate exact resistor voltage divider networks (E24 1% tolerance) to step down modular synthesizer control voltages (10V to 3.3V/5V) with 1V/Octave semitone quantization and real-time Web Audio pitch synthesis.
EV Charging Time, Level 1 / Level 2 / DC Fast Amperage Sizer
Client-side interactive engineering calculator for ev charging time, level 1 / level 2 / dc fast amperage sizer. 100% private in-browser computation with zero server transit.
EV vs Gas Car Cost Calculator
Compare the true 5-year cost of an electric vehicle versus a gas car — including purchase price, fuel, insurance, maintenance, and tax credits.
Exact-KB Target File Compressor
Compress image or document files to sit just under an exact target file size (e.g. 200KB, 100KB, 50KB) for government and visa upload portals.
Excel to JSON
Convert Excel spreadsheet data to JSON
Exhaust Primary Header Tube Diameter & Tuned Length Sizer
Client-side interactive engineering calculator for exhaust primary header tube diameter & tuned length sizer. 100% private in-browser computation with zero server transit.
EXIF Photo Privacy & GPS Metadata Scrubber
Strip camera models, GPS geolocation coordinates, shutter speeds, and private metadata from photos before sharing online.
Experience Letter Generator
Generate official employee experience certificates and relieving letters ready for formal signing.
Expert JPG to PNG Converter — Professional-Grade & 100% Private
Convert JPEG to lossless PNG instantly with img.ubify's Neural Engine. Enterprise-grade batch processing, zero-server uploads, and asset sovereignty.
Exponent & Power Calculator
Calculate base numbers raised to positive, negative, and fractional exponent powers with scientific notation formatting.
Expungement Eligibility Checker
Determine eligibility guidelines to seal or expunge a criminal record
Expungement Eligibility Checker
Find out whether you may be eligible to have a criminal record expunged — based on offense type, time elapsed, and state.
Extract Images from PDF
Extract embedded photos, graphics, and figures from PDF files with batch ZIP download.
Extract Images from PDF
Document inspection workspace for analyzing embedded graphics and photo assets in PDF files. Automated bitmap extraction engine is currently in active development.
Extract PDF Pages
Select individual pages from your PDF using visual thumbnail previews and compile them into a separate document. Recompiles locally in your browser using pdf-lib.
Extract Text from PDF
Document viewer workspace for inspecting raw text strings and layout streams in PDF documents. Structured paragraph parsing engine is currently in active development.
Fair Bill Splitter & Dining Group Calculator
Determine group dining costs by combining your food subtotal, exact dollar sales tax, and tip percentage. Review per-person shares, couple pair totals, and pre-tax food portions.
Fake Name Generator (Test Data)
Generate synthetic placeholder identities with names, addresses, and test emails for QA and software mockups.
Fancy Text Generator
Generate text with Unicode decorations and styles
Favicon & App Icon Generator — Multi-Platform Icon Suite
Generate complete favicon sets for Web, iOS, and Android. Upload one logo and get a ZIP with all standard sizes, including .ico and manifest files. 100% private.
Favicon Generator
Generate favicons from any image
FD Calculator
Calculate fixed deposit maturity amount, total interest earned, and compounded growth across tenures.
Fertilizer NPK Application Sizer
Calculate exact pounds of bagged fertilizer to apply based on N-P-K percentage numbers and lawn area.
FHA Loan & Mortgage Insurance Payment Calculator
Calculate monthly FHA mortgage payments including 3.5% minimum down payment, 1.75% financed upfront MIP, annual mortgage insurance premium, property taxes, and homeowners insurance.
Fiber Optic Link Loss Budget & Attenuation Calculator
Calculate total optical channel attenuation (dB) across singlemode (1310nm/1550nm) and multimode links with fusion splices, connector insertion loss, safety margin, and transceiver power certification.
Fibonacci & Golden Ratio Sizer
Calculate golden ratio dimensions and sequence terms for web design layouts, photography grids, and typography scales.
File Checksum & SHA Multi-Hash Verifier
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes directly from local files in-browser with instant checksum comparison.
Fill PDF Forms
Document workspace for reviewing form layouts and interactive fields in PDF contracts and tax packets. In-browser AcroForm field editor is currently in active development.
Film Exposure Foot-Candles to ISO & T-Stop Cine Light Sizer
Client-side interactive engineering calculator for film exposure foot-candles to iso & t-stop cine light sizer. 100% private in-browser computation with zero server transit.
Final Exam Grade Needed Calculator
Calculate the exact score needed on your final exam to achieve your target course grade based on current standing and exam weight.
Find & Replace
Find and replace text with optional regex support
FIRE (Financial Independence, Retire Early) Calculator
Calculate your exact FIRE retirement number, target nest egg using the 4% Safe Withdrawal Rule, and years to financial freedom.
Firewood Cord & Stack Sizer
Calculate firewood cord volume from stacked pile dimensions to verify delivery quantities and avoid short firewood loads.
Flexbox Layout Generator
Generate CSS Flexbox layouts interactively
Floor & Wall Tile Calculator
Calculate the number of tiles and boxes needed for floors, bathrooms, and backsplashes.
Floor Joist Span & Deflection L/360 Structural Sizer
Client-side interactive engineering calculator for floor joist span & deflection l/360 structural sizer. 100% private in-browser computation with zero server transit.
Flooring & Tile Square Footage Calculator
Calculate square footage, waste factors (10%-15%), total box counts, and material costs for hardwood, tile, and vinyl plank flooring.
Florida Statute of Limitations
Florida personal injury deadline (2 yrs under Fla. Stat. § 95.11(4)(a) [HB 837 Reform]) and contract deadlines.
Fluid CSS Mesh Gradient Studio
Create vibrant multi-point organic mesh gradients with drag-and-drop color pins, blur radii, and pure CSS radial/linear export.
FM Synthesis Carrier-to-Modulator Frequency Ratio Explorer
Client-side interactive engineering calculator for fm synthesis carrier-to-modulator frequency ratio explorer. 100% private in-browser computation with zero server transit.
Focus Ambient Sound Generator (White, Pink & Brown Noise)
Generate pure white noise, pink noise, brown noise, binaural beats, and relaxing rain acoustics client-side via Web Audio API.
Font Pairing Tool
Discover beautiful Google Font pairings
Fraction Calculator & Step-by-Step Solver
Add, subtract, multiply, and divide fractions with step-by-step reduction, mixed number conversions, and decimal equivalents
Fractional Drill Bit to Decimal/Metric Sizer
Convert fractional inches (e.g., 5/16", 7/64") to decimal inches and millimeter tap drill sizes.
France Passport Photo Maker — Official 35x45mm Online Biometric Studio
Format 35x45mm French passport, CNI, and visa portraits according to ANTS standards. Client-side canvas alignment with optional ephemeral cloud background removal.
Free Calculators for Your Website & Blog
Embed free, responsive mortgage, loan, and math calculator widgets on your website with 1-click iframe codes.
Free Resume Builder
Build ATS-friendly modern resumes with customizable career sections and instant vector PDF export.
Freelance Hourly Rate & Billable Hours Calculator
Calculate the minimum hourly billing rate needed to hit your target take-home salary after self-employment tax, unbillable admin hours, and operating expenses.
Freelance Hourly Rate Sizer
Calculate what hourly billing rate you must charge clients to hit your take-home pay goals after self-employment taxes and unpaid hours.
Freelance Rate Calculator
Calculate minimum billable hourly and day rates to hit target take-home income
Freelance Rate Calculator
Calculate the exact hourly rate you need to charge to hit your income goal — accounting for taxes, expenses, unpaid hours, and time off.
Freelancer Billable Hourly Rate Calculator
Calculate the true hourly billing rate required to hit your desired take-home salary, factoring in self-employment taxes, business overhead, and unbillable admin hours.
Frosted Glassmorphism Card Designer
Design ultra-modern glassmorphic UI cards with backdrop-filter blur, border specular highlights, and translucent alpha backgrounds.
Fuel Injector Flow Rate CC/Min to Horsepower Sizer
Client-side interactive engineering calculator for fuel injector flow rate cc/min to horsepower sizer. 100% private in-browser computation with zero server transit.
Future Value (FV) Calculator
Calculate the future value of an initial investment and monthly deposits over time.
Game Boy Camera 2-Bit Tilemap & ROM Palette Extractor
Convert any photo into authentic 1998 Nintendo Game Boy Camera 4-color 2BPP pixel art. Features the original 4x4 Bayer dither matrix, 8x8 VRAM tilemap deduplication, and RGBDS/GB Studio assembly exports.
Gamertag Generator
Generate badass gaming aliases and gamertags for Xbox, PlayStation, Steam, and Discord with 1337speak.
Gas Pipe CFM & Meter Pressure Sizing (NFPA 54)
Client-side interactive engineering calculator for gas pipe cfm & meter pressure sizing (nfpa 54). 100% private in-browser computation with zero server transit.
GCD & LCM Calculator
Calculate Greatest Common Divisor and Least Common Multiple
Generator Starting Motor Inrush Amps & Running Wattage Sizer
Client-side interactive engineering calculator for generator starting motor inrush amps & running wattage sizer. 100% private in-browser computation with zero server transit.
Geomagnetic Storm Kp-Index to Aurora Borealis Visibility Sizer
Client-side interactive engineering calculator for geomagnetic storm kp-index to aurora borealis visibility sizer. 100% private in-browser computation with zero server transit.
Georgia Statute of Limitations
Georgia personal injury deadline (2 yrs under Ga. Code § 9-3-33) and contract deadlines.
Germany Passport Photo Maker — Official 35x45mm Online Biometric Studio
Format official 35x45mm German Passbild photos for Reisepass and Personalausweis. Biometrietabelle alignment with optional cloud background removal.
GFR Kidney Function Calculator (CKD-EPI)
Calculate estimated Glomerular Filtration Rate (eGFR) using the clinical CKD-EPI creatinine equation.
GIF Maker
Create GIFs from multiple images
Git Emergency & 'Oh Shit, Git!' Interactive Resolver
Interactive guided selector to diagnose and fix bad commits, broken merges, detached heads, and lost code safely without data loss.
Glare & Washed-Out Barcode Contrast Restorer
Restore washed-out barcodes caused by camera flash glare and wrinkled cellophane packaging into crisp, high-contrast scannable clarity.
Glassmorphism CSS & Tailwind Studio
Design frosted glass UI cards with adjustable backdrop blur, opacity, and specular border highlights with instant CSS and Tailwind export.
Global Distributed Team Sync Hours Sizer
Find shared working hours for remote teams distributed across US, European, and Asian timezones.
Global Timezone Meeting & Overlap Planner
Compare working hours across multiple global cities to quickly pinpoint the optimal conference call and meeting overlap window.
Google Fonts Visual Pairing Studio
Curated typography pairings featuring Inter, Roboto, Playfair Display, Montserrat, and Fira Code with live headline/body preview.
Government & Portal Upload Pre-Flight Checker
Test photos and documents against official US Visa, UK Passport, UPSC, and Schengen upload specifications before applying
Government KYC Photo & Signature Stack & Stitch Maker
Combine your passport photo on top and signature underneath in a single 300×400px image under 50KB for civil service exams and bank KYC portals.
GPS Dilution of Precision (DOP) Position Error Sizer
Client-side interactive engineering calculator for gps dilution of precision (dop) position error sizer. 100% private in-browser computation with zero server transit.
GPS Track (.gpx) Telemetry Video Overlay Generator
Convert Strava, Garmin, and Apple Watch .gpx routes into clean transparent speedometer, elevation gain, and telemetry HUD overlays for GoPro, YouTube, and action camera videos.
GraphQL Schema to TypeScript Type Synthesizer
Convert GraphQL schema definitions (SDL) into TypeScript types, query operation payloads, and resolver signature contracts.
Gratuity Calculator
Calculate statutory severance gratuity under Indian Gratuity Act 1972 and Pakistan employment ordinances.
Gravel & Crushed Stone Calculator
Calculate gravel tonnage and cubic yards for driveways, French drains, and landscaping paths.
Gray Code, BCD & Binary Logic Studio
Binary to Gray code and Gray to Binary converter with step-by-step XOR derivations, BCD 8421 nibbles, and bitwise logic gates
Great Circle Haversine Distance & Initial Bearing GPS Sizer
Client-side interactive engineering calculator for great circle haversine distance & initial bearing gps sizer. 100% private in-browser computation with zero server transit.
Grid-Tie Solar Net Metering Annual True-Up Bill Estimator
Client-side interactive engineering calculator for grid-tie solar net metering annual true-up bill estimator. 100% private in-browser computation with zero server transit.
Grinding Wheel Surface Feet per Minute (SFPM) Max RPM Sizer
Client-side interactive engineering calculator for grinding wheel surface feet per minute (sfpm) max rpm sizer. 100% private in-browser computation with zero server transit.
Gross Margin vs Markup Sizer
Compare profit margin against cost markup percentage to set wholesale prices, protect product margins, and avoid common unit economics pricing errors.
GS1-128 SSCC-18 Pallet Barcode Generator & Verifier
Calculate official GS1 Modulo-10 checksums, verify 18-digit Serial Shipping Container Codes (SSCC), and generate compliant GS1-128 logistics pallet barcodes with Application Identifier (00) for Amazon FBA and Walmart.
GST Calculator
Calculate GST-inclusive and GST-exclusive pricing, tax components, and net amounts across standard slabs.
Guitar Amplifier Output Transformer Impedance Ratio Sizer
Client-side interactive engineering calculator for guitar amplifier output transformer impedance ratio sizer. 100% private in-browser computation with zero server transit.
Half-Wave Dipole & Inverted-V Antenna Cutting Length Sizer
Client-side interactive engineering calculator for half-wave dipole & inverted-v antenna cutting length sizer. 100% private in-browser computation with zero server transit.
Hardwood Board Foot Volume & Rough-Sawn Lumber Pricing Calculator
Client-side interactive engineering calculator for hardwood board foot volume & rough-sawn lumber pricing calculator. 100% private in-browser computation with zero server transit.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
Hash Generator (Crypto)
Generate cryptographic hashes (MD5, SHA family)
Hashtag Generator
Generate viral trending hashtags for Instagram, TikTok, and YouTube grouped by size and niche.
Headphone Amplifier Output Power mW to dB SPL Loudness Sizer
Client-side interactive engineering calculator for headphone amplifier output power mw to db spl loudness sizer. 100% private in-browser computation with zero server transit.
Heat Pump COP to SEER2 & HSPF2 Heating Cost Analyzer
Client-side interactive engineering calculator for heat pump cop to seer2 & hspf2 heating cost analyzer. 100% private in-browser computation with zero server transit.
Heat Sink Thermal Resistance Sizer
Evaluate maximum allowable heatsink thermal resistance (Rθsa in °C/W) to protect power semiconductors, voltage regulators, and microprocessors from overheating.
Helical Axial-Mode Circular Polarization Antenna Sizer
Client-side interactive engineering calculator for helical axial-mode circular polarization antenna sizer. 100% private in-browser computation with zero server transit.
HELOC Payment Calculator
Estimate monthly Home Equity Line of Credit payments comparing initial interest-only draw obligations against fully amortized principal repayment.
HEX to Binary & Decimal
Convert between hexadecimal, binary, and decimal
HEX to RGB & RGBA
Convert HEX color codes to RGB and RGBA values
Hexadecimal Calculator & ASCII Converter
Perform base-16 hexadecimal addition and subtraction with instantaneous decimal, binary bitmask, and ASCII character conversions.
Hexle — Daily CSS Hex Color Guessing Puzzle
Guess the daily 6-character hexadecimal CSS color code in 6 tries. Features real-time swatch comparison, RGB channel delta clues, and shareable Wordle-style score grids.
High-Speed Slow-Motion Frame Rate to Shutter Light Flicker Sizer
Client-side interactive engineering calculator for high-speed slow-motion frame rate to shutter light flicker sizer. 100% private in-browser computation with zero server transit.
High-Yield Savings Account (HYSA) Calculator
Calculate monthly compounded interest on high-yield savings accounts and compare net returns against traditional 0.01% bank accounts.
High-Yield Savings vs Inflation Growth Calculator
Calculate nominal account growth and real inflation-adjusted purchasing power across high-yield savings accounts (HYSA) with monthly recurring contributions.
Hijri Date Converter
Convert Gregorian calendar dates to Islamic lunar Hijri dates with moon-sighting adjustment controls.
Historical Inflation & Purchasing Power Calculator
Calculate how compound price inflation erodes currency purchasing power and determine the future equivalent dollar amount required to maintain living standards.
HMAC Generator
Generate HMAC authentication codes
Home Affordability Calculator
Calculate maximum purchase budget and comfortable monthly mortgage payments
Home Affordability Calculator
Calculate the maximum home price your income and debts can support — with full monthly payment breakdown and down payment analysis.
Home Battery Storage Round-Trip Efficiency Loss Sizer
Client-side interactive engineering calculator for home battery storage round-trip efficiency loss sizer. 100% private in-browser computation with zero server transit.
Home Down Payment Savings Calculator
Calculate your required down payment, estimated closing costs, and savings timeline to purchase a home based on target price and monthly savings capacity.
Home Energy Audit Tool
Enter your appliances and usage patterns and get a complete breakdown of your home energy costs — with the highest-impact changes to make.
Home Generator Surge & Wattage Sizer
Calculate portable or standby generator wattage required to power home refrigerators, well pumps, lights, and AC.
Home Seller Net Proceeds Sizer
Calculate how much cash you walk away with when selling your home after agent commissions, mortgage payoffs, and closing fees.
Home Solar Panel Payback & ROI Calculator
Calculate the break-even years, 30% Federal Solar ITC tax credit, and 25-year lifetime net electric bill savings for home solar panels.
Home Studio & Theater Sabine RT60 Decay Calculator
Calculate acoustic room reverb decay times (RT60) using Sabine and Eyring formulas with absorption coefficients for walls, ceiling, and flooring.
Homebrew Beer ABV & Gravity Sizer
Calculate alcohol percentage and yeast attenuation for homebrewed beer, cider, and mead from hydrometer gravity readings.
Horn Subwoofer Acoustic Flare Cutoff Frequency Sizer
Client-side interactive engineering calculator for horn subwoofer acoustic flare cutoff frequency sizer. 100% private in-browser computation with zero server transit.
Hospital Medical MRI & CT Scan DICOM (.dcm) Patient Viewer
View patient MRI, CT, and X-Ray radiological scans directly in your browser with Window Center / Width radiologist contrast calibration without installing sketchy desktop PACS software.
House R-Value Insulation & Heat Loss BTU/hr Calculator
Client-side interactive engineering calculator for house r-value insulation & heat loss btu/hr calculator. 100% private in-browser computation with zero server transit.
Hreflang Tag Validator
Validate hreflang tags for multilingual SEO
HTML Entities & Unicode Code Points Directory
Searchable directory of 2,000+ HTML named entities, decimal values, hex codes, and Unicode glyphs with 1-click clipboard copy.
HTML Escape & Unescape
Escape or unescape HTML entities
HTML Extractor & Stripper
Extract text by stripping all HTML tags from content
HTML Minifier
Minify HTML by removing unnecessary whitespace
HTML Table Generator
Create and edit semantic HTML tables with visual spreadsheet controls and copy clean table markup.
HTML Table to CSV & Excel Converter
Convert HTML tables or web data into clean CSV, Excel (XLSX), JSON, and Markdown formats with live data grid preview
HTML to Markdown
Convert HTML code to Markdown format
HTML to PDF
Convert HTML content to downloadable PDF
HTML to PDF
Document preview workspace for reviewing HTML layouts and web page source before PDF export. Client-side HTML rendering engine is currently in active development.
HTTP Header Checker
Inspect HTTP response headers for any URL
HTTP Security Headers & CSP Configuration Auditor
Audit Content-Security-Policy (CSP), HSTS, X-Frame-Options, Permissions-Policy, and generate copy-paste Nginx and Cloudflare security headers.
HTTP Status Code Lookup
Look up HTTP status codes and their meanings
HVAC Airflow CFM, Friction Rate & Duct Sizer (ACCA Manual D)
Size round spiral pipes and equivalent rectangular sheet metal ductwork based on room CFM airflow, friction rate per 100 ft, and quiet residential velocity limits following ACCA Manual D guidelines.
HVAC Duct Airflow CFM & Diameter Calculator
Calculate round and rectangular HVAC duct sizes from required CFM airflow and maximum allowable air velocity in feet per minute.
HVAC Refrigerant PT Chart, Superheat & Subcooling Calculator
Calculate HVAC refrigerant pressure-temperature saturation curves, target superheat, and subcooling metrics for R-410A, R-22, R-134a, and R-32 systems.
Hydraulic Cylinder Force, Flow Rate & Cycle Time Calculator
Calculate hydraulic cylinder push/pull force, fluid flow rate in GPM/LPM, and extension/retraction cycle time.
Hydroelectric Micro-Turbine Head & Flow Wattage Calculator
Client-side interactive engineering calculator for hydroelectric micro-turbine head & flow wattage calculator. 100% private in-browser computation with zero server transit.
I2C Bus Pull-Up Resistor & Bus Capacitance Sizer
Calculate minimum and maximum I2C bus pull-up resistor values based on bus capacitance, supply voltage, and standard/fast mode bus speeds.
ID & Passport Photo Maker — Print-Ready 35x45mm & 2x2in Studio
Create professional ID, Passport, and Visa photos in seconds. Auto-crop to exact requirements, remove background, and generate print-ready grid sheets (4-up, 12-up) locally. 100% private.
ID Card Maker
Create official CR80 employee and student ID cards with photo framing and scannable barcode slots.
ID Photo Background Remover — White & Blue Backdrops
Instantly change passport and visa photo backgrounds to white, light blue, or grey. 100% compliant with government biometric standards. Zero-server local processing.
Ideal Body Weight Calculator
Compare target healthy body weights across 4 established medical formulas (Devine, Robinson, Miller, and Hamwi).
Illinois Statute of Limitations
Illinois personal injury deadline (2 yrs under 735 Ill. Comp. Stat. § 5/13-202) and contract deadlines.
Image Color Palette & Dominant Swatch Extractor
Extract dominant color palettes, vibrance swatches, and hex codes from uploaded images with WCAG contrast pairing scores.
Image Color Palette Extractor — Professional Design Intelligence
Extract vibrant color palettes from any image instantly. Get hex codes, RGB values, and professional color schemes for your design projects. 100% private.
Image Color Picker
Pick colors from any uploaded image
Image Compressor
Compress images to reduce file size
Image Compressor — Reduce File Size Free Online
Compress images free online. Reduce JPG, PNG, WebP file size without visible quality loss. 100% browser-based.
Image Cropper
Crop images to specific dimensions
Image Cropper — Focus & Frame Free Online
Crop images online for free. Custom aspect ratios, social media presets, and batch cropping. No upload, 100% private.
Image DPI Changer — Convert to 300 DPI for Print Online Free
Change image DPI to 300, 600, or custom levels instantly. Fix low-resolution photos for government submission and professional printing. 100% private.
Image Format Converter
Convert between PNG, JPG, and WebP formats
Image Metadata (EXIF) Viewer
View image metadata and EXIF data
Image Resizer
Resize images to specific dimensions
Image Resizer — Scale Pixel Dimensions Online
Resize image dimensions in pixels or percentages with aspect ratio locking. 100% in-browser canvas processing for JPG, PNG, and WebP.
Image to Base64
Convert images to Base64 encoded strings
Image to Base64 Converter — Developer Utility
Convert images to Base64 strings instantly. Perfect for CSS, JSON, and HTML embeds. 100% private local processing.
Image to PDF
Convert multiple PNG and JPG images into a single multi-page PDF document. Each page matches the native width and height of the corresponding image. Compiles locally in your browser using pdf-lib.
Image to PDF Studio — Convert JPG to PDF Online Free
Convert JPG, PNG, and WebP to professional PDF documents. Multi-photo stitching, margin controls, and 100% private local processing. No upload required.
In-Browser Grep, Sort & Line Filter Studio
Client-side Unix stream tools: Regex Grep, Head/Tail line slicing, natural numerical sorting, duplicate removal, and email/URL/IP extractor
In-Browser Screen & Window Video Recorder
Record your desktop screen, specific application window, or browser tab with optional audio and export directly to WebM or MP4.
Income Tax Calculator
Calculate annual income tax and tax slab breakdown for Pakistan, India, US, and UK tax regimes.
India Aadhar Card Photo Maker — Official Document Sizing
Format and align portrait photos for Indian Aadhar card enrollment and updates to official UIDAI specifications with in-browser canvas cropping.
India PAN Card Photo Maker — 2.5x3.5cm Online Sizer
Format and compress portrait photos for Indian PAN card applications to NSDL and UTIITSL specifications under 50KB in your browser.
Indian Passport Photo Maker — Official 35x45mm Online Tool
Format 35x45mm Indian passport photos adhering to MEA standards. In-browser alignment with optional ephemeral cloud background removal.
Instagram Caption Generator
Generate engaging lifestyle, travel, fitness, and selfie Instagram captions with curated hashtag sets.
Instagram Grid Maker
Split photos into seamless 3×3, 3×2, or 3×1 tiles with automated reverse-numbered ZIP download.
Instant Direct Deposit Voided Check PDF Generator
Creates a bank-compliant sample voided check with customized routing, account number, MICR-E13B font strip, and watermark for payroll direct deposit and ACH setup.
Insulation R-Value Batt Sizer
Calculate fiberglass and mineral wool insulation batt packages for 2x4 and 2x6 stud walls and attic floors.
Interactive Git Branching & Merge Visualizer
Simulate git branch, checkout, commit, merge, and rebase operations with an interactive visual commit DAG graph.
Intermittent Fasting Schedule Calculator
Calculate your daily fasting schedule, feeding window, and autophagy phases for intermittent fasting protocols.
Intermodulation Distortion (IMD3) Third-Order Intercept Sizer
Client-side interactive engineering calculator for intermodulation distortion (imd3) third-order intercept sizer. 100% private in-browser computation with zero server transit.
Internal Link Extractor
Extract all internal and external links from HTML
Internal Rate of Return (IRR) Calculator
Calculate internal rate of return (IRR) on multi-year business projects and commercial real estate cash flows.
International Shoe Size Matrix Sizer
Convert footwear sizes between US Men/Women, UK, European (EU), and Mondopoint centimeter foot measurements.
Internet Download Time & Transfer Speed Calculator
Calculate how long it takes to download games, files, or video assets across 100 Mbps, 300 Mbps, 1 Gbps fiber, or Starlink connections.
Internet Speed Test
Test broadband download speed, latency, and ping connection quality
Internet Speed Test
Test your download speed, upload speed, and ping — with ISP detection, connection type, result history, and a shareable speed report.
Investment Return Calculator
Calculate compound investment returns and portfolio growth over time
Investment Return Calculator
Unlock the math of wealth generation. Visualize compound interest, the 'Cost of Waiting' penalty, and find the portfolio balance you need for life.
Invisible Character & Blank Space Generator
Copy invisible empty characters (Hangul Filler U+3164, Zero-Width Space U+200B) for Discord names, WhatsApp blank messages, and bio spacing with built-in hidden character detector
Invitation Maker
Design personalized invitations for birthdays, weddings, and parties with PNG and print-ready PDF export.
IP Address Lookup
Get geolocation data for any IP address
IP Subnet & CIDR Prefix Calculator
Calculate IPv4 network address, usable host ranges, broadcast IP, and wildcard masks from CIDR notation.
IPv4 Integer, Hex & Binary Radix Matrix
Convert IPv4 addresses simultaneously between Dotted Quad, 32-bit Integer, Hex, Binary, and reverse in-addr.arpa with subnet scope detection
IPv4 Subnet Mask & Host Sizer
Calculate IPv4 subnet boundaries, total and usable hosts, subnet masks, and wildcard masks.
Ireland Passport Photo Maker — Official 35x45mm Online Studio
Format 35x45mm Irish passport and Passport Online digital photos according to DFA guidelines. Local browser alignment with optional cloud background removal.
Ishihara Color Blindness Vision Screener
Interactive 10-plate Ishihara color perception test to screen for Protanopia, Deuteranopia, and Tritanopia color deficiencies.
Italy Passport Photo Maker — Official 35x45mm Fototessera Studio
Format 35x45mm fototessera portraits for Italian passaporto and Carta d'Identità Elettronica (CIE). Client-side sizing with optional cloud cutout.
Japan Passport Photo Maker — Official 35x45mm MOFA Studio
Format 35x45mm Japanese passport and visa photos adhering to MOFA standards. In-browser canvas alignment with optional ephemeral cloud background removal.
JavaScript Beautifier & Minifier
Beautify or minify JavaScript code
JPG to WebP Converter — Next-Gen Image Compression
Transform JPEGs into modern WebP assets. Shrink your image payload by up to 35% without visible quality loss. 100% private.
JSON Formatter & Validator
Format, beautify, and validate JSON data with syntax highlighting
JSON Minifier
Minify JSON by removing all whitespace and formatting
JSON Semantic Diff & Tree Comparator
Side-by-side semantic visual comparison of two JSON objects with deep structural key diffs and syntax-highlighted change badges.
JSON to CSV
Convert JSON data to CSV format
JSON to Excel
Convert JSON data to Excel format
JSON to JSON Schema Generator (Draft-07 & 2020-12)
Infer Draft-07 and Draft 2020-12 JSON Schema structures directly from sample JSON data with automatic UUID, email, and date formatting.
JSON to TypeScript & Zod Schema Synthesizer
Convert arbitrary JSON responses into strongly-typed TypeScript interfaces, Zod validation schemas, and JSON Schema definitions.
JSON to XML
Convert JSON data to XML format
JSON to YAML
Convert JSON data to YAML format
JSONPath Query Studio & Filter Tester
Test JSONPath expressions against complex JSON trees with syntax highlighting, node path previews, and filtered results export.
JWT (JSON Web Token) Debugger & Claims Inspector
Decode, inspect, and analyze JWT tokens offline. Check expiration timestamps (exp/iat/nbf), issuer claims, and signature algorithms privately.
JWT Debugger & Secret Craftsman
Decode, verify HMAC-SHA signatures, modify payload claims, inspect expiration timers, and craft signed test tokens in-browser.
JWT Decoder
Decode and inspect JSON Web Token payloads
Keyboard Key Rollover & Ghosting Tester
Interactive keyboard tester to detect stuck keys, test N-Key Rollover (NKRO), identify ghosting limits, and log key history.
Keyword Density Checker
Analyze keyword frequency and density in text
kg to lbs Converter
Convert kilograms to pounds and stones with gym barbell fitness presets and formula breakdowns.
Knitting & Crochet Yarn Skein Sizer
Calculate yarn yardage and number of skeins required for knitting and crochet projects based on craft type and size.
Landscape Mulch Bags to Cubic Yards Sizer
Calculate landscape mulch in cubic yards and bagged bark quantities based on flower bed square footage and layer depth.
Laser & Vinyl Cutter Kerf Offset & Path Welder (SVG)
Compensates for laser beam width (kerf) by expanding outside profiles and shrinking inner holes so interlocking joints and gears fit tightly. Auto-welds broken bezier nodes.
Lathe Turning Surface Speed (SFM) & Feed Rate per Revolution
Client-side interactive engineering calculator for lathe turning surface speed (sfm) & feed rate per revolution. 100% private in-browser computation with zero server transit.
Lawn Grass Seed & Overseeding Sizer
Calculate pounds of grass seed needed for Fescue, Kentucky Bluegrass, Bermuda, and Ryegrass lawns.
Lawn Mowing Time & Mower Sizing Calculator
Calculate time to mow your yard based on cutting deck width, ground speed, lawn acreage, and obstacle turning efficiency.
LC Resonant Tank Frequency & Q-Factor Calculator
Client-side interactive engineering calculator for lc resonant tank frequency & q-factor calculator. 100% private in-browser computation with zero server transit.
Lean Body Mass (LBM) Calculator
Calculate lean body mass (muscles, bones, organs, and water) without invasive hydrostatic tank testing.
Leave Application Generator
Draft formal leave letters for sick, annual, and casual absence from office or school with instant PDF.
LED Video Wall Resolution, Pixel Pitch & Viewing Distance Sizer
Client-side interactive engineering calculator for led video wall resolution, pixel pitch & viewing distance sizer. 100% private in-browser computation with zero server transit.
Legal Document Bates Stamping Engine
Sequential Bates numbering stamp generator for legal discovery, exhibits, and court documents with prefix, suffix, and padding options.
Lens Depth of Field & Bokeh Blur Circle Simulator
Simulate optical Depth of Field (DoF), near and far sharp limits, hyperfocal distance, and background bokeh circle-of-confusion diameter across Full Frame, APS-C, Super 35, and Medium Format camera sensors with real-time ray diagrams.
Life Insurance Needs Calculator
Calculate exact life insurance coverage gap using the DIME method
Life Insurance Needs Calculator
Don't leave your family's future to a sales agent. Calculate your exact coverage gap using the DIME-2026 method and secure true financial peace of mind.
Lined Notebook & Graph Paper Line Eraser
Erase distracting blue notebook lines and graph grids from photos of handwritten homework or engineering proofs, leaving your handwriting on clean white paper.
Linux Chmod Permissions Matrix
Calculate Unix/Linux file and folder permissions across Owner, Group, and Public/Others.
Linux Systemd Service Generator
Generate production-ready systemd unit files to daemonize Node, Go, Rust, or Python background processes.
Lithium 18650 / 21700 S/P Battery Pack Balancer & Busbar Sizer
Design custom Series-Parallel (S/P) battery packs for DIY e-bikes, robotics, and solar storage. Computes nominal and peak pack voltages, total Watt-hours, continuous discharge ampacity, and pure nickel strip vs copper busbar gauge.
Live HTML & CSS Viewer (TryIt Editor)
Interactive live HTML, CSS, and JavaScript real-time editor and code sandbox with responsive viewport previews and instant download
Live Streaming RTMP / SRT Video Bitrate & Bandwidth Sizer
Client-side interactive engineering calculator for live streaming rtmp / srt video bitrate & bandwidth sizer. 100% private in-browser computation with zero server transit.
LLC vs S-Corp Tax Calculator
Compare self-employment tax savings between LLC and S-Corporation salary distributions
LLC vs S-Corp Tax Calculator
Compare your tax liability as an LLC versus an S-Corp at your income level — and find out at what point switching structures saves you money.
Loan & EMI Calculator
Calculate monthly loan payments and EMI
Loan EMI & Amortization Calculator
Advanced amortization schedule and extra payment interest savings calculator
Loan EMI & Amortization Calculator
Identify why you're paying 80% interest in year one. Use our advanced amortization engine to find the 'extra payment' sweet spot and beat the bank.
Logarithm Calculator (log, ln, log2)
Calculate natural logarithms (ln), base-10 common logs, binary base-2 logs, and arbitrary base logarithms.
Logo Maker (Icon & Typography)
Compose custom brand logos with modern vector symbols, font pairings, and transparent SVG export.
LoRaWAN Long-Range Wireless Link Margin & RSSI Predictor
Client-side interactive engineering calculator for lorawan long-range wireless link margin & rssi predictor. 100% private in-browser computation with zero server transit.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text
Lottery Number Generator
Generate cryptographically random quick-picks for Powerball, Mega Millions, EuroMillions, and Lotto 6/49.
Lottie Animation Inspector & Speed Controller
Inspect and test Lottie JSON animations with playback speed controls, frame scrubbers, background tint switchers, and asset audits.
Love Compatibility & Name Match Calculator
Playful love compatibility and name numerology calculator for couples and friends.
LUFS Loudness Meter & True Peak Auditor
Streaming ITU-R BS.1770 / EBU R128 loudness meter measuring integrated LUFS and True Peak dBFS against Spotify, YouTube, and Apple Music targets.
Macro Split & TDEE Calorie Sizer
Calculate daily calorie burn (TDEE) and macronutrient gram targets for fat loss, muscle building, and maintenance.
Macronutrient Split Calculator
Calculate customized daily macronutrient grams and caloric distributions based on your fitness goals.
Magnetic Loop Small Transmitting Antenna Efficiency Sizer
Client-side interactive engineering calculator for magnetic loop small transmitting antenna efficiency sizer. 100% private in-browser computation with zero server transit.
Markdown & LaTeX Table Synthesizer
Interactive spreadsheet grid to build, format, and convert tables between Markdown, LaTeX tabular, HTML, and CSV formats.
Markdown to HTML
Convert Markdown text to HTML
Markdown to PDF
Convert Markdown text to downloadable PDF
Markdown Viewer & Live Editor
Split-screen GitHub Flavored Markdown editor with live HTML preview, syntax formatting toolbar, word count, and HTML/PDF export
Marriage Biodata Maker
Design elegant matrimonial biodata profiles with traditional ornamental framing and printable PDF.
Mastering Equalizer Q-Factor to Bandwidth in Octaves Converter
Client-side interactive engineering calculator for mastering equalizer q-factor to bandwidth in octaves converter. 100% private in-browser computation with zero server transit.
Meat Roast Cooking & Resting Time Calculator
Calculate oven roasting times, pull temperature, carryover cooking rise, and resting duration for beef, poultry, pork, and lamb.
Mechanical Keyboard Switch Soundboard
Auditory simulator for Cherry MX Blue, Red, Brown, and Topre switches with interactive typing test and customizable actuation audio.
Meme Generator Pro — Viral Meme Creator No Watermark
Create viral memes instantly with our pro-grade editor. Choose from classic templates or upload your own. 100% private, no watermarks, and high-res exports.
Menstrual Cycle Calculator
Forecast upcoming period start dates, ovulation timing, and high-fertility windows with 100% client-side privacy.
Menstrual Period & Cycle Tracker
Track your menstrual cycle and forecast your next 3 period start dates and PMS timelines.
Mental Health Symptom Checker
Confidential symptom self-assessment score and mental health guidance
Mental Health Symptom Checker
Answer a short questionnaire and get a score-based assessment of common mental health symptoms — with guidance on when to seek professional support.
Mercari Seller Payout & Direct Deposit Calculator
Calculate Mercari seller payouts, direct deposit fees ($0 ACH or $3.00 Instant Pay), and net resale profits.
Merge Images Online
Combine multiple images horizontally side-by-side or stacked vertically with custom margins.
Merge PDF Files
Combine multiple PDF documents into a unified file with drag-and-drop page reordering. Merges all pages locally in your browser using pdf-lib with zero server uploads.
Meta Tag Analyzer
Analyze and extract meta tags from HTML content
Metal Hardness Brinell, Rockwell C, Vickers & Tensile Converter
Client-side interactive engineering calculator for metal hardness brinell, rockwell c, vickers & tensile converter. 100% private in-browser computation with zero server transit.
Metal Thermal Heat Shrink Fit Interference Diameter Sizer
Client-side interactive engineering calculator for metal thermal heat shrink fit interference diameter sizer. 100% private in-browser computation with zero server transit.
Mexico Passport Photo Maker — Official SRE Standards
Format compliant Mexican passport and consular registration photos according to SRE criteria. Client-side canvas alignment with optional ephemeral cloud cutout.
Michigan Statute of Limitations
Michigan personal injury deadline (3 yrs under Mich. Comp. Laws § 600.5805(2)) and contract deadlines.
Micro-QR Code (11×11 to 17×17) High-Density Generator
Generates ultra-compact Micro-QR matrix codes (M1, M2, M3, M4) with a single finder pattern for PCB circuit boards, electronics serial tags, and watchmaker parts. Vector SVG and integer-scaled PNG.
Microphone & Audio Input Visualizer
Real-time microphone tester with live volume level meters, audio oscilloscope frequency waveform, and noise floor diagnostic.
Microphone Polar Pattern Proximity Effect & Off-Axis Attenuation
Client-side interactive engineering calculator for microphone polar pattern proximity effect & off-axis attenuation. 100% private in-browser computation with zero server transit.
Microstrip Transmission Line Characteristic Impedance (IPC-2141)
Client-side interactive engineering calculator for microstrip transmission line characteristic impedance (ipc-2141). 100% private in-browser computation with zero server transit.
MIDI File Event List & Polyphonic Note Visualizer
Inspect raw Standard MIDI (.mid) files directly in your browser with zero DAW plugins or risky downloads. View timing ticks, pitch velocity, CC automation, and audition tracks with the built-in Web Audio synth.
Midpoint & Distance Formula Calculator
Calculate 2D midpoint coordinates, Euclidean distance, and segment slope between points (x1, y1) and (x2, y2).
MIME Type Checker
Look up MIME types for file extensions
Mobile Deposit Check Print Aligner (Front & Endorsement Box)
Generates a calibrated 8.5×11″ sheet with exact 6×2.75″ check front and back endorsement boxes matching mobile banking camera viewports to prevent mobile deposit app rejection.
Mock Data & API Payload Generator
Generate synthetic dummy data for APIs and databases: User profiles, e-commerce, and transactions exported to JSON, CSV, YAML, or SQL
Mock JSON API Server & Fixture Generator
Generate realistic fake databases with users, products, e-commerce orders, and timestamps for prototyping and frontend mock servers.
Moon Phase Illumination Percentage & Next Full Moon Predictor
Client-side interactive engineering calculator for moon phase illumination percentage & next full moon predictor. 100% private in-browser computation with zero server transit.
Morse Code Converter
Convert between text and Morse code
Mortgage & Extra Principal Amortization Calculator
Calculate monthly mortgage payments (P&I) and model how making recurring extra principal contributions shortens your loan term and reduces total interest charges.
Mortgage Affordability Calculator
Calculate home-buying power and monthly payment breakdown with taxes and insurance
Mortgage Affordability Calculator
Stop guessing your home-buying power. Get a high-precision breakdown of your true monthly payment including PMI, property taxes, and the '2026 Maintenance Multiplier'.
Mortgage Refinance Break-Even Calculator
Calculate monthly payment reductions, break-even timeline, and 5-year net savings when refinancing an existing mortgage at a lower interest rate.
Mortise and Tenon Joint Geometry & Proportional Sizer
Client-side interactive engineering calculator for mortise and tenon joint geometry & proportional sizer. 100% private in-browser computation with zero server transit.
Moving Cost Estimator
Get a realistic estimate of what your move will cost — based on distance, home size, and whether you're hiring movers or doing it yourself.
Moving House Box & Tape Packing Sizer
Calculate how many cardboard boxes, wardrobe cartons, and packing tape rolls you need to pack your home based on bedroom count and belongings density.
MP3 Cutter Online
Trim and cut MP3, WAV, and audio tracks with precise visual timeline sliders.
MP4 to MP3 Converter
Extract clean audio tracks from MP4 and WebM video files 100% locally in your browser.
MPPT Solar Charge Controller Voc Cold Temperature Safety Sizer
Client-side interactive engineering calculator for mppt solar charge controller voc cold temperature safety sizer. 100% private in-browser computation with zero server transit.
Mulch, Soil & Landscaping Calculator
Calculate garden mulch and topsoil volume in cubic yards and 2 cubic foot bags based on depth.
Multi-Color E-Paper 7-Color Dither & Byte Array Engine
Convert color photos for Waveshare 7-Color ACeP (Spectra 6) and 3-color BWR e-Paper displays using custom Floyd-Steinberg and Atkinson error diffusion. Exports ready-to-flash C hex byte arrays for Arduino and ESP32 display drivers.
Multi-Hash Checksum & Integrity Verifier
Calculate MD5, SHA-1, SHA-256, SHA-512, CRC-32, Adler-32, and NTLM simultaneously with target checksum matching and report export
Multi-LED Current Limiting Resistor & Wattage Sizer
Calculate series current limiting resistor values, power dissipation wattage, and forward voltage drops for single and multi-LED arrays.
Multi-Platform App Icon Packager
Generate a complete bundle of iOS, Android, macOS, Windows, and PWA icon sizes from a single master 1024x1024 graphic.
Multi-Tool Pipeline & Chain Runner
Visual data and text transformation pipeline. Chain multiple formatters, Base64 encoders, deduplicators, and sanitizers together with real-time in-browser execution.
Music Sheet Key Transposition & Pitch Shift PDF Re-Notator
Transposes sheet music scores up or down semitones with key signature indicators, clef shifts, and vocal octave adjustments for singers and instrumentalists.
Mute Video Online
Remove audio tracks from video files with one click for silent website headers and clean loops.
Near-Field to Far-Field Rayleigh Antenna Distance Sizer
Client-side interactive engineering calculator for near-field to far-field rayleigh antenna distance sizer. 100% private in-browser computation with zero server transit.
Net Worth & 20-Year Asset Allocation Visualizer
Model your 20-year net worth trajectory across equities, real estate equity, cash savings, and liabilities with monthly investment contributions and compound returns.
Net Worth Calculator
Track assets vs. liabilities and benchmark your financial standing
Net Worth Calculator
Calculate your real financial truth serum. Track assets vs. liabilities with 2026 inflation-adjusted benchmarks and see exactly where you stand in the top 10%.
Netherlands Passport Photo Maker — Official 35x45mm Pasfoto Tool
Format 35x45mm Dutch pasfoto portraits for passports and Nederlandse identiteitskaart adhering to Rijksoverheid matrix rules. Client-side editing with optional cloud cutout.
Network Ports & Protocols Encyclopedia
Searchable directory of standard TCP/UDP ports, vulnerabilities, default services, and common firewall rule templates.
Neumorphic Soft UI Component Generator
Craft modern soft neumorphism cards, concave/convex surfaces, and pressed buttons with calculated dual light/shadow vectors.
Neutral Density (ND) Filter Exposure Stops & Shutter Speed Sizer
Client-side interactive engineering calculator for neutral density (nd) filter exposure stops & shutter speed sizer. 100% private in-browser computation with zero server transit.
New York Statute of Limitations
New York personal injury deadline (3 yrs under N.Y. C.P.L.R. § 214(5)) and contract deadlines.
NGINX Reverse Proxy Sizer
Build production-ready NGINX upstream proxy configuration blocks with real-time port mapping, client upload size limits, and optional WebSocket upgrade headers.
North Carolina Statute of Limitations
North Carolina personal injury deadline (3 yrs under N.C. Gen. Stat. § 1-52(16)) and contract deadlines.
Notary & Legal Exhibit Bates Numbering & Stamp PDF Sequencer
100% Client-Side in-browser PDF stamping. Sequentially applies Bates discovery numbering (e.g. DEF-000001) or legal exhibit stickers without uploading confidential files to any third-party server.
Number Base Converter
Convert numbers between binary, octal, decimal, and hex
Number Sequence & Series Calculator
Solve arithmetic and geometric progressions. Calculate the nth term, common difference, common ratio, and partial sum of the series with step-by-step formula breakdowns.
Number to Words
Convert numbers to written words
Number to Words & Roman Numeral Engine
Convert numbers into words formatted for bank checks (USD, EUR, GBP) and contracts, plus two-way Roman numeral converter with step proofs
Numerology Calculator
Calculate Life Path, Expression/Destiny, Soul Urge, and Personality numbers with Pythagorean interpretations.
O-Ring Sizing & Gland Groove Calculator
Calculate seal squeeze percentage, gland groove depth, diametral clearance, and cross-section void fill for static and dynamic O-ring applications.
OBS Streaming Bitrate Matcher
Determine recommended OBS Studio video bitrates, keyframe intervals, and audio settings matched to your internet upload bandwidth and streaming platform.
OCR PDF Text Recognition
Document inspection workspace for analyzing scanned and image-based PDF files. In-browser optical character recognition (OCR) engine is currently in active development.
Off-Grid Daily Watt-Hour Energy Budget & Solar Array Sizer
Client-side interactive engineering calculator for off-grid daily watt-hour energy budget & solar array sizer. 100% private in-browser computation with zero server transit.
Off-Grid Generator Autostart Battery State-of-Charge Sizer
Client-side interactive engineering calculator for off-grid generator autostart battery state-of-charge sizer. 100% private in-browser computation with zero server transit.
Official Notary Public Jurat & Acknowledgment Journal Ledger Sizer
Client-side interactive engineering calculator for official notary public jurat & acknowledgment journal ledger sizer. 100% private in-browser computation with zero server transit.
Ohio Statute of Limitations
Ohio personal injury deadline (2 yrs under Ohio Rev. Code § 2305.10) and contract deadlines.
Oil Cooler Sizing & Heat Rejection BTU/hr Calculator
Client-side interactive engineering calculator for oil cooler sizing & heat rejection btu/hr calculator. 100% private in-browser computation with zero server transit.
One Rep Max (1RM) Calculator
Estimate your maximum one-repetition strength for barbell squat, bench press, and deadlift from sub-maximal sets using Brzycki, Epley, and Lombardi models.
Online Alarm Clock
Set custom alarms directly in your web browser with loud WebAudio synthesizer sound alerts.
Online Metronome
Musical tempo keeper with WebAudio BPM slider, tap tempo detection, and selectable time signatures.
Online Stopwatch
High-precision digital stopwatch with millisecond lap timing, split records, and keyboard hotkeys.
Online Tone Generator & Binaural Studio
Generate pure sine, square, triangle, and sawtooth audio frequencies from 20 Hz to 20 kHz with stereo binaural beat entrainment.
Op-Amp Closed-Loop Gain & Cutoff Bandwidth Calculator
Calculate operational amplifier inverting and non-inverting closed-loop voltage gain, gain bandwidth product (GBWP), and cutoff frequency.
Open Graph Previewer
Preview how your page looks when shared on social media
Optical Distance to Horizon & Line of Sight Radar Sizer
Client-side interactive engineering calculator for optical distance to horizon & line of sight radar sizer. 100% private in-browser computation with zero server transit.
Optical Field of View (FOV) Horizontal / Vertical Angle Sizer
Client-side interactive engineering calculator for optical field of view (fov) horizontal / vertical angle sizer. 100% private in-browser computation with zero server transit.
Orthographic to Isometric 2.5D Technical Drawing Projector
Transforms 2D multi-view orthographic profiles (Front, Top, Right) into accurate 30° axonometric isometric projections with hidden-line suppression and vector SVG export.
Oven to Air Fryer Calculator & Convection Converter
Convert conventional oven recipe cook times and temperatures to rapid vortex air frying with mid-cycle basket shake timers and food presets
Overtime & Double-Time Paycheck Sizer
Determine gross paycheck totals across multi-tiered hourly shifts with distinct 1.0x regular, 1.5x time-and-a-half, and 2.0x double-rate line items.
Ovulation & Fertility Window Calculator
Calculate your peak fertility window and estimated ovulation day based on your last period and cycle length.
Oxy-Acetylene Torch Tip Size & Gas Pressure Flow Sizer
Client-side interactive engineering calculator for oxy-acetylene torch tip size & gas pressure flow sizer. 100% private in-browser computation with zero server transit.
Page Size Checker
Check the total page size of a URL
Page Word Count (SEO)
Count words on a page for SEO analysis
Paint Coverage & Gallon Sizer
Calculate how many gallons of paint and primer you need for any room with automatic deductions for doors and windows.
Paint Coverage & Gallons Calculator
Calculate interior wall paint coverage and gallons required based on room perimeter, ceiling height, door and window surface deductions, and coat counts.
Palindrome Checker
Check if a word or phrase is a palindrome
Parabolic Dish Antenna Gain & Beamwidth Calculator
Client-side interactive engineering calculator for parabolic dish antenna gain & beamwidth calculator. 100% private in-browser computation with zero server transit.
Passive 2-Way & 3-Way Speaker Crossover Component Sizer
Client-side interactive engineering calculator for passive 2-way & 3-way speaker crossover component sizer. 100% private in-browser computation with zero server transit.
Passport & Visa 4×6 Print Sheet ($0.35 Hack)
Lay out 6 or 8 official passport/visa photos on a standard 4×6 inch sheet to print at Walgreens, CVS, or Walmart for $0.35 instead of $17.99.
Password Entropy & Brute Force Time Calculator
Calculate Shannon entropy in bits, character keyspace, and realistic crack times across modern GPU clusters.
Password Entropy & Brute-Force Crack Time Simulator
Calculate Shannon password entropy bits, brute-force cracking time on supercomputers and GPU clusters, and NIST 800-63B compliance 100% offline.
Password Entropy & GPU Cracking Time Simulator
Calculate password Shannon entropy bits and simulate brute-force cracking time across single GPUs, 8x RTX 4090 rigs, and cloud clusters.
Password Generator
Generate strong, random passwords
Password Strength Checker
Check the strength of any password
Past Exam & Study PDF Highlighter Remover
Erase distracting fluorescent yellow, green, and pink highlighter marks from scanned study notes and past papers while keeping black text intact.
Patio Paver & Sand Base Estimator
Calculate patio stones, crushed aggregate base volume in cubic yards, and leveling sand bags needed for patios, fire pits, and walkways with a 10% cutting waste buffer.
Payment Processor Fee & Net Sizer
Calculate domestic and international credit card gateway transaction fees, net payout, and reverse fee invoices.
PCB Trace Width & Current Capacity (IPC-2152)
Calculate required PCB copper trace width for internal and external layers based on maximum allowable temperature rise (ΔT) and DC current.
PCB Trace Width & Current Capacity Calculator (IPC-2152)
Calculate optimal PCB trace width, copper weight, and temperature rise according to IPC-2152 and IPC-2221 engineering standards.
PDF Bloat & Stream Composition Analyzer
Analyze internal PDF streams to discover whether uncompressed photos, full-weight fonts, or vector clutter are inflating your file size
PDF Buddy — Complete PDF Utility
The most powerful free PDF tool online. Merge, split, compress, and edit PDF files instantly in your browser — no sign up or credit card ever required.
PDF Digital Signer & Visual Stamp Studio
Draw or upload signatures, add professional date/approval stamps, and overlay them onto PDF documents directly in your browser.
PDF Metadata Viewer & Editor
Inspect and modify internal PDF metadata fields including title, author, subject, creator, and creation dates. Save changes or wipe tags locally in your browser using pdf-lib.
PDF Saddle-Stitch Booklet Imposer
Reorder multi-page PDF documents into duplex fold-and-staple signatures for printing booklets, church bulletins, playbills, and zines on home printers.
PDF to Clean Markdown Converter
Extract text from PDF documents and structure it into clean, readable Markdown headings, paragraphs, bullet points, and code blocks.
PDF to Excel
Extract structured tabular text streams from invoices and bank statements into Excel-ready CSV files.
PDF to HTML
Document preview workspace for analyzing PDF structure and text streams before HTML export. Automated DOM layout conversion engine is currently in active development.
PDF to Image Converter
Convert every page of your PDF into high-resolution PNG or JPG graphics rendered at 2x scale. Bundles all converted pages into a downloadable ZIP archive directly in your browser.
PDF to JPG
Convert PDF document pages into high-resolution JPG or PNG images with 150/300 DPI and ZIP export.
PDF to Text Converter
Extract plain text content from digital PDF documents into an on-screen viewer with one-click clipboard copying and TXT file export. Extracts in-browser using pdfUtils with zero server uploads.
PDF Zero-Color Toner Saver (Bypass Empty Color Cartridges)
Laser printer refusing to print black-and-white because Cyan or Magenta is low? Strips rich-black CMY channels and forces pure 100% K-channel black ink commands.
Pennsylvania Statute of Limitations
Pennsylvania personal injury deadline (2 yrs under 42 Pa. Cons. Stat. § 5524(2)) and contract deadlines.
Percent Error Calculator
Calculate experimental percent error and absolute discrepancy between observed laboratory data and true theoretical values.
Percentage Calculator
Calculate percentages, increases, and decreases
Permutations & Combinations (nPr & nCr) Calculator
Calculate permutations where sequence matters and combinations where selection order does not matter, with exact factorial values up to n = 20.
Permutations & Combinations (nPr & nCr) Sizer
Calculate permutation nPr and combination nCr counts with factorial step-by-step expansions.
Personal Injury Settlement Estimator
Estimate compensation ranges for personal injury claims based on damages and lost income
Personal Injury Settlement Estimator
Get a realistic estimate of what a personal injury claim might be worth — based on injury type, severity, lost income, and state.
Phone-Scan Paper Whitener & Shadow Eraser
Erase hand shadows, yellow lighting, and dingy paper backgrounds from phone camera photos. Converts photos into crisp flatbed scans client-side.
Photo & Document Metadata Forensic Inspector
Inspect, analyze, and sanitize hidden GPS coordinates, camera serials, and privacy metadata from photos and documents client-side
Photo Collage Maker
Arrange photos into beautiful grid collages with customizable borders and spacing.
Photo Filters Online — Color Grading & Effect Presets
Apply color grading filter presets including Teal & Orange, Vintage, and Noir B&W in your browser. 100% in-browser processing with zero server uploads.
Photo to Coloring Page
Convert photos and portraits into printable black-and-white coloring book outlines with edge detection.
Photoshop PSD & AI File Instant Web Inspector
Inspect and view Adobe Photoshop (.psd) and Illustrator (.ai) files in high-resolution directly in your browser without an Adobe subscription.
Photovoltaic Array Tilt Angle by Latitude & Seasonal Adjustment
Client-side interactive engineering calculator for photovoltaic array tilt angle by latitude & seasonal adjustment. 100% private in-browser computation with zero server transit.
Photovoltaic Solar Panel Angle & Inter-Row Shading Obstruction Simulator
Calculate exact minimum row-to-row spacing distance (D) to prevent front solar panel rows from casting shadows onto back rows during the critical winter solstice at 9 AM – 3 PM.
Ping Tool
Ping a host to check connectivity
Pipe Water Flow Darcy-Weisbach Friction Head Loss Calculator
Client-side interactive engineering calculator for pipe water flow darcy-weisbach friction head loss calculator. 100% private in-browser computation with zero server transit.
Pixels to MM Converter — Print Dimension Calculator
Calculate millimeters, centimeters, and inches from screen pixels across 300, 150, and 72 DPI print densities. Client-side math calculator with zero uploads.
Placeholder Image Generator
Generate placeholder images with custom dimensions
Plant Spacing & Garden Grid Calculator
Calculate the exact number of plants, groundcover plugs, or flower bulbs needed for any garden area using square or triangular grid spacing.
Plasma Cutter Air CFM, Amps & Cut Speed Travel Sizer
Client-side interactive engineering calculator for plasma cutter air cfm, amps & cut speed travel sizer. 100% private in-browser computation with zero server transit.
PNG to JPG Converter — In-Browser Image Optimization
Convert PNG images to JPG format in your browser. Solid background fill for transparent pixels, adjustable quality, and 100% client-side canvas encoding.
PNG to SVG Converter — In-Browser Vector Tracing
Convert PNG and JPG bitmaps into scalable SVG vector paths in your browser. Path-smoothing and threshold controls with 100% local WebAssembly processing.
PNG to WebP Converter — Transparent Image Compression
Convert PNG images to WebP format while preserving full alpha-channel transparency. 100% in-browser canvas encoding with zero server uploads.
Podcast File Size & Bandwidth Sizer
Calculate podcast episode file size (MB) and monthly bandwidth transfer based on listener download volume.
Polaroid Photo Maker
Transform digital snapshots into retro Polaroid-style prints with custom handwritten captions.
Pomodoro Timer
Deep work productivity timer following the 25-minute focus sprint and 5-minute break Pomodoro technique.
Pool Salt & Chlorine Salinity PPM Calculator
Calculate the exact pounds or kilograms of pool salt needed to bring saltwater chlorine generators to their target 3,200 PPM operating salinity.
Port Checker
Check if a specific port is open
Poshmark Seller Fee & Earnings Calculator
Calculate Poshmark seller fees (flat $2.95 under $15 or 20% over $15), shipping discounts, and net earnings on fashion reselling.
Post-Frame Pole Barn Wind Uplift & Footing Sizer
Client-side interactive engineering calculator for post-frame pole barn wind uplift & footing sizer. 100% private in-browser computation with zero server transit.
Poster Maker
Design high-impact promotional posters for concerts, sales, and events with A4 printable PDF.
PPF Calculator
Calculate 15-year Public Provident Fund maturity proceeds and tax-free interest with year-by-year schedule.
Prayer Times Calculator
Compute daily Islamic prayer timetables for Fajr, Dhuhr, Asr, Maghrib, and Isha using international conventions.
Pregnancy Due Date Calculator
Calculate estimated baby due date, trimester timeline, and gestational age
Pregnancy Due Date Calculator
Enter your last period date and get your full pregnancy calendar — with due date, trimester breakdown, and key milestone dates.
Pregnancy Weight Gain Calculator
Calculate recommended pregnancy weight gain based on Institute of Medicine (IOM) pre-pregnancy BMI guidelines.
Present Value (PV) Calculator
Calculate the present value of money to determine what a future sum is worth in today's dollars.
Prime Number Checker
Check if a number is prime
Print Bleed & Crop Mark Inserter
Inject professional 0.125-inch bleed margins and vector trim marks to Canva or Word PDFs to prevent commercial print shop rejection.
Print Sheet Maker — Tile Photos on A4 & 4x6 Paper
Tile photographs or labels into multi-up grid sheets for A4, Letter, and 4x6 inch paper. 100% in-browser layout generation with trim marks.
Print-on-Demand T-Shirt & Fabric Wrinkle Displacement Mockup
Warps flat graphics and logos onto realistic fabric folds, folds shading, and wrinkles using custom displacement mapping and multiply blend modes in your browser.
Printable Graph Paper & Template Generator
Generate and print custom dot grid, isometric, Cornell notes, and blank sheet music staves calibrated to A4 and US Letter.
Privacy Fence Estimator
Calculate posts, horizontal rails, and vertical dog-ear pickets for residential perimeter privacy fences.
Private Offline PDF Invoice & Receipt Builder
Generate beautiful client invoices and payment receipts with customizable line items, tax rates, currencies, and instant PDF download.
Probability & Odds Calculator
Calculate probability of single events, joint probabilities (P(A and B)), and odds ratios.
Professional HEIC to JPG Converter — 100% Private Apple Photo Studio
Transform HEIC to high-fidelity JPG or PNG instantly. Our Wasm-based decoder preserves 10-bit/12-bit Apple color depth with zero server exposure. Batch process iPhone photos securely.
Profile Picture Maker
Design custom circular avatars with vibrant border rings, gradient backgrounds, and zoom framing.
Profit Margin Calculator
Calculate gross margin, operating margin, and markup percentage on goods and services
Profit Margin Calculator
Calculate gross, operating, and net profit margins for any product or business — with benchmarks by industry to see how you compare.
Projector Throw Distance, Screen Size & Lumens Lux Sizer
Client-side interactive engineering calculator for projector throw distance, screen size & lumens lux sizer. 100% private in-browser computation with zero server transit.
Propane Tank Burner Runtime Sizer
Calculate how many hours a standard 20lb, 30lb, or 100lb propane tank will last for grills, patio heaters, and generators.
Property Tax Estimator
Estimate annual and monthly property taxes by home value, state rate, and exemptions
Property Tax Estimator
Estimate your annual property tax based on home value and state — and see how it affects your total monthly housing cost.
ProRes & H.265 Video Encoding Bitrate to File Size Storage Sizer
Client-side interactive engineering calculator for prores & h.265 video encoding bitrate to file size storage sizer. 100% private in-browser computation with zero server transit.
Protect PDF
Recompile PDF pages into a fresh document container to remove legacy permissions and re-index streams. Note: Browser-based pdf-lib tools do not apply hardware AES password encryption.
Punycode & IDN International Domain Converter
Convert international Unicode domains (umlauts, accents, Cyrillic, Chinese, emojis) into DNS-safe ASCII (xn--) and back with validation
PX to REM Converter
Convert pixels to rem relative units based on root base font size for responsive CSS typography.
Python Online Compiler & REPL
In-browser Python 3 WebAssembly REPL and online compiler powered by Pyodide with zero server execution, instant stdout, and timing
Qibla Direction Finder
Find exact Qibla compass direction and degree bearing toward the Holy Kaaba in Mecca with GPS geolocation.
QR Code Generator
Generate QR codes from text or URLs
Quadratic Equation Factoring & Vertex Sizer
Solve quadratic equations with the quadratic formula, discriminant (b²-4ac), and parabola vertex points.
Quadratic Equation Solver (ax² + bx + c = 0)
Solve quadratic equations ax² + bx + c = 0 with real and complex roots, discriminant, and parabola vertex.
Quarter-Mile Elapsed Time & Trap Speed Horsepower Sizer
Client-side interactive engineering calculator for quarter-mile elapsed time & trap speed horsepower sizer. 100% private in-browser computation with zero server transit.
Quarter-Wave Monopole Ground Plane Radial Length Sizer
Client-side interactive engineering calculator for quarter-wave monopole ground plane radial length sizer. 100% private in-browser computation with zero server transit.
Raised Bed Soil & Compost Sizer
Calculate how much soil, peat moss, and compost is required for raised garden beds, planter boxes, and vegetable gardens.
Random Name Picker
Draw fair random winners from any candidate list with animated suspense and automatic elimination rules.
Random Number Generator (RNG)
Generate truly random integers between custom minimum and maximum bounds using browser crypto APIs.
Random Token Generator
Generate random tokens in various formats
Random Word Generator
Generate random English words for Pictionary, creative writing prompts, and vocabulary games.
Ratio & Aspect Ratio Scaler Calculator
Solve proportional ratios A:B = C:X and scale video and display aspect ratios (16:9, 4:3, 21:9).
RC Low-Pass & High-Pass Passive Filter Cutoff Sizer
Calculate cutoff frequency (-3dB), time constant (tau), and phase response for first-order passive RC low-pass and high-pass filters.
RD Calculator
Calculate recurring deposit maturity value and accrued interest from regular monthly bank deposits.
Readability Score Checker
Calculate readability scores for your content
Reading Time & Speech Duration Calculator
Calculate silent reading time and spoken speech delivery duration based on word count, reading pace (WPM), speech cadence, and pauses.
Reading Time Estimator
Estimate reading time for any text
Rebar Weight, Spacing & Concrete Grid Sizing Calculator
Client-side interactive engineering calculator for rebar weight, spacing & concrete grid sizing calculator. 100% private in-browser computation with zero server transit.
Receipt Generator
Create itemized sales, cash, and service receipts with automated tax calculation and thermal PDF download.
Redact PDF
Document inspection workspace for locating confidential figures, personal identifiers, and account numbers. Visual black-out redaction engine is currently in active development.
Redirect Chain Checker
Check URL redirect chains and status codes
RegEx Find & Replace Capture Playground
Interactive regular expression tester with capture group substitution ($1, $2), named captures, and real-time replaced text preview.
RegEx Railroad Visual Syntax Diagrammer
Render regular expressions into intuitive visual railroad track diagrams explaining branches, quantifier loops, and assertions.
Regex Tester
Test regular expressions with real-time matching and highlighting
Rehab Cost Estimator
Estimate out-of-pocket costs for medical detox, residential inpatient, and outpatient rehab
Rehab Cost Estimator
Estimate the cost of addiction treatment programs by type, duration, and location — so finances are never a barrier to getting help.
REM Sleep Cycle & Bedtime Calculator
Calculate sleep cycles to wake up energized between 90-minute natural REM cycles rather than groggy mid-cycle.
Rent vs Buy Calculator
Compare true cumulative costs of renting vs buying with home equity and appreciation
Rent vs Buy Calculator
Find out whether renting or buying makes more financial sense for your exact situation — with a break-even timeline and 10-year cost comparison.
Rental Cash-on-Cash Return Analyzer
Calculate net cash flow, mortgage principal/interest, property management fees, and cash-on-cash ROI for rental properties.
Reorder Pages
Reorder PDF pages visually using client-side drag-and-drop thumbnails. Rearrange page order in your browser and export a newly organized document without uploading files to a server.
Repair PDF
Upload and inspect potentially damaged PDF files within a local browser workspace. Note: Deep binary xref table reconstruction and corrupt stream parsing are currently in active development.
Required Minimum Distribution (RMD) Calculator
Calculate mandatory IRS Required Minimum Distributions (RMD) for Traditional IRAs and 401(k) accounts based on SECURE 2.0 rules.
Resistor Color Code & SMD Resistor Calculator
Decode 4-band and 5-band through-hole resistor color bands into Ohms and tolerance, or decode 3-digit and 4-digit EIA SMD surface-mount codes.
Resize Image to MM & CM — 300 DPI Print Resizer
Resize images to exact physical millimeter (mm), centimeter (cm), or inch dimensions at 300 DPI. 100% in-browser canvas processing with zero server uploads.
Response Time Checker
Check response time for any URL
Restaurant Bill & Tip Splitter
Compute restaurant gratuity on pre-tax food and drink subtotals, add sales tax, and determine each guest's exact share. Calculate per-person totals and individual tip portions in your browser.
Retaining Wall Block & Backfill Sizer
Calculate segmental concrete retaining wall blocks, drain gravel, and capstones for landscape terrace walls.
Retaining Wall Surcharge Soil Pressure & Block Count Sizer
Client-side interactive engineering calculator for retaining wall surcharge soil pressure & block count sizer. 100% private in-browser computation with zero server transit.
Retirement Calculator
Calculate required retirement corpus, inflation-adjusted living expenses, and monthly savings gap.
Return on Investment (ROI) Calculator
Calculate return on investment (ROI) and annualized compound return across business investments, real estate, and stocks.
RF Attenuator Pi, Tee & Bridged-T Resistor Pad Calculator
Client-side interactive engineering calculator for rf attenuator pi, tee & bridged-t resistor pad calculator. 100% private in-browser computation with zero server transit.
RF Coaxial Cable Loss, VSWR & Return Loss Calculator
Convert Voltage Standing Wave Ratio (VSWR) to Return Loss (dB) and reflection coefficient (ρ). Computes matched and mismatched coaxial cable power attenuation for LMR-400, RG-58, and RG-8X from HF to 6 GHz.
RF Friis Free-Space Path Loss (FSPL) Link Budget Sizer
Client-side interactive engineering calculator for rf friis free-space path loss (fspl) link budget sizer. 100% private in-browser computation with zero server transit.
RF Power dBm to Watts & Volts Peak-to-Peak Converter
Client-side interactive engineering calculator for rf power dbm to watts & volts peak-to-peak converter. 100% private in-browser computation with zero server transit.
RF Skin Depth & AC Conductor Resistance Calculator
Client-side interactive engineering calculator for rf skin depth & ac conductor resistance calculator. 100% private in-browser computation with zero server transit.
Ring Size & Finger Measurement Sizer
Convert finger circumference measurement in millimeters to international ring sizes (US, UK, European).
Road Trip Fuel & Passenger Sizer
Calculate total gas money and per-passenger contributions for vacation road trips and daily commutes.
Road Trip Fuel Cost & Gas Calculator
Calculate fuel cost for road trips based on distance, vehicle MPG, gas price, and passenger splits.
robots.txt Tester
Test and validate robots.txt rules
Roman Numeral Converter
Convert between decimal and Roman numerals
Roof Pitch Slope (X/12), Common Rafter Length & Overhang Sizer
Client-side interactive engineering calculator for roof pitch slope (x/12), common rafter length & overhang sizer. 100% private in-browser computation with zero server transit.
Roofing Shingle & Square Sizer
Calculate roofing squares and asphalt shingle bundles with pitch slope slope multipliers and waste allowances.
Room AC BTU Capacity Sizer
Calculate the exact cooling BTU rating required for room window units and mini-split air conditioners.
Room Mode Axial, Tangential & Oblique Resonant Standing Wave Sizer
Client-side interactive engineering calculator for room mode axial, tangential & oblique resonant standing wave sizer. 100% private in-browser computation with zero server transit.
Rotate & Flip Image Online — Orientation & Leveling
Rotate images 90 degrees, flip horizontally or vertically, and adjust fine rotation angles in your browser. 100% client-side canvas processing with zero uploads.
Rotate Pages
Rotate individual PDF pages or all pages simultaneously by 90, 180, or 270 degrees. Adjust page orientation in your browser and save the corrected document locally.
Rotate Video Online
Rotate sideways or upside-down video clips by 90°, 180°, 270° or flip them horizontally and vertically.
Roth IRA Calculator
Project how maxing out your annual Roth IRA contributions builds tax-free retirement wealth over time.
Round Image Corners Online — Circular Avatar & Border Radius Maker
Round image corners or create circular profile avatars with custom radius sliders. 100% in-browser canvas clipping with transparent PNG export.
RSA Key Generator
Generate RSA public/private key pairs
Running Pace & Marathon Split Calculator
Calculate running pace per mile or kilometer, race finish times, and target splits for 5K, 10K, Half Marathon, and Full Marathon
Running Race Pace & Split Times
Calculate average running pace per mile and kilometer to hit goal finish times in road races and marathons.
SaaS Churn Rate & Customer LTV Sizer
Calculate subscription churn rate, customer lifetime duration in months, and LTV-to-CAC efficiency ratios for SaaS businesses.
SaaS Metrics & Rule of 40 Calculator
Calculate ARR, MRR, Customer Lifetime Value (LTV), CAC Ratio, Net Churn Rate, and your venture Rule of 40 score.
SaaS Pricing Calculator
Model subscription tiers, target MRR/ARR, and unit economics for software products
SaaS Pricing Calculator
Calculate the right price for your SaaS product based on target revenue, user count, and feature tiers — with a competitive positioning guide.
Salary Calculator
Convert gross salary to net take-home pay with country tax presets for Pakistan, India, US, and UK.
Salary Slip Generator
Generate professional employee payslips with earnings, deductions, and net salary in print-ready PDF.
Salary to Hourly, Weekly & Daily Rate Converter
Convert between annual salary, monthly pay, bi-weekly checks, weekly wages, and hourly rates while accounting for weekly work hours and paid time off (PTO).
Sales Tax & Pre-Tax Receipt Calculator
Calculate state and local sales tax additions or reverse calculate pre-tax amounts from total purchase receipts.
Sample Rate Pitch Transposer & Tape Speed Semitone Sizer
Client-side interactive engineering calculator for sample rate pitch transposer & tape speed semitone sizer. 100% private in-browser computation with zero server transit.
Sand Casting Gating Ratio & Choke Area Runner Sizer
Client-side interactive engineering calculator for sand casting gating ratio & choke area runner sizer. 100% private in-browser computation with zero server transit.
SAT to ACT Score Concordance Converter
Convert between SAT and ACT composite scores using official College Board and ACT concordance comparison tables.
Satellite Dish Azimuth, Elevation & LNB Polarization Skew Sizer
Client-side interactive engineering calculator for satellite dish azimuth, elevation & lnb polarization skew sizer. 100% private in-browser computation with zero server transit.
Saturated Steam Properties & Enthalpy Calculator
Client-side interactive engineering calculator for saturated steam properties & enthalpy calculator. 100% private in-browser computation with zero server transit.
Savings Goal Calculator
Calculate required monthly savings and timeline to reach financial goals
Savings Goal Calculator
Generic savings advice fails in 2026. Set specific milestones for emergency funds, travel, and housing with our priority-weighted goal engine.
Scanned Document Auto-Deskewer & Angle Straightener
Straighten tilted and crooked scanned documents to precise 0.1° accuracy without pixel blur or downloading third-party software.
Schema Markup Validator
Validate JSON-LD schema markup
Schengen Visa & Passport Photo Maker — Official 35x45mm Online Studio
Format 35x45mm Schengen visa photos adhering to European consular guidelines. Local browser alignment with optional ephemeral cloud background removal.
Schengen Visa Photo Maker — Official 35x45mm Online Tool
Create Schengen visa photos for Europe. Official 35x45mm size, white background, and biometric compliance. 100% private.
Scientific Calculator
Full scientific calculator with advanced functions
Scientific Notation Calculator
Convert standard decimal numbers to scientific notation (a × 10^b) and engineering notation.
Scrabble Word Finder
Find playable Scrabble and Words with Friends words from your tile rack with official point scores.
Screen PPI & Display Resolution Calculator
Calculate pixels per inch (PPI), dot pitch, physical display dimensions, and total megapixel count from resolution and diagonal size.
Screen QR Code Scanner & Decoder
Scan and decode QR codes from screen captures, uploaded images, webcam, or clipboard with 1-click URL extraction
Screen Resolution Checker
Check monitor resolution, browser viewport dimensions, and device pixel ratio in realtime.
Screenshot Beautifier
Add stylish gradient backgrounds, macOS title bar dots, and drop shadows to code and app screenshots.
Screenshot to Text (OCR)
Extract text from images using OCR
Script Duration Calculator
Calculate speech and voiceover duration from script word count across slow, normal, and fast cadences.
Security Camera & Dashcam CCTV Timestamp OSD Inpainter
Seamlessly inpaints and removes baked-in bright yellow or green OSD date/time stamps, channel overlays, and camera IDs from video frames or surveillance photos.
Semantic Versioning (SemVer) Bumper
Calculate next release version numbers under SemVer 2.0.0 and test dependency compatibility ranges.
Sentence Counter
Count the number of sentences in text
Serial Baud Rate & UART Timing Calculator
Calculate byte transmission times, actual throughput in KB/s, frame bits (start, data, parity, stop), and buffer fill times for microcontrollers (Arduino, ESP32, STM32).
SERP Snippet Previewer
Preview how your page appears in search results
Sewing Fabric Yardage Sizer
Calculate fabric yards required for sewing projects, curtains, quilting, and upholstery.
Shaft Keyway Shear Stress & Key Length Sizer
Client-side interactive engineering calculator for shaft keyway shear stress & key length sizer. 100% private in-browser computation with zero server transit.
Sheet Metal Air Bending Press Brake Tonnage & V-Die Sizer
Client-side interactive engineering calculator for sheet metal air bending press brake tonnage & v-die sizer. 100% private in-browser computation with zero server transit.
Sheet Metal K-Factor, Bend Allowance & Blank Flat Pattern Sizer
Client-side interactive engineering calculator for sheet metal k-factor, bend allowance & blank flat pattern sizer. 100% private in-browser computation with zero server transit.
Sheet Metal Punching & Piercing Shear Tonnage Sizer
Client-side interactive engineering calculator for sheet metal punching & piercing shear tonnage sizer. 100% private in-browser computation with zero server transit.
Shielding Gas Flow Rate (CFH) & Cylinder Arc Time Sizer
Client-side interactive engineering calculator for shielding gas flow rate (cfh) & cylinder arc time sizer. 100% private in-browser computation with zero server transit.
Sign PDF
Document inspection workspace for reviewing signature zones, agreements, and contract layouts. Note: In-browser canvas signature drawing and cryptographic certificate stamping are currently in active development.
Signature Generator
Draw or type custom digital signatures and export as transparent PNGs for PDF contracts.
Significant Figures (Sig Fig) Calculator
Identify significant digits, leading/trailing zeros, and round numbers to target sig fig precision.
Singapore Passport Photo Maker — Official 35x45mm ICA Studio
Format 35x45mm and 400x514px Singapore passport portraits meeting ICA criteria. Client-side canvas alignment with optional ephemeral cloud cutout.
SIP Calculator
Calculate mutual fund SIP compounding growth, maturity wealth, and interest returns with yearly tables.
Sleep Cycle & Circadian REM Clock Calculator
Calculate optimal bedtimes and wake-up times aligned with 90-minute REM sleep cycles to prevent waking up groggy during deep slow-wave sleep.
Sleep Debt Calculator
Find out how much sleep debt you've accumulated this week and what it's costing your health, focus, and performance.
Slope & Line Equation Calculator
Calculate the slope (rise over run), angle, distance, and slope-intercept line equation between two coordinate points.
Small Claims Court Limit Checker
Find maximum dollar limits for small claims court in all 50 US states
Small Claims Court Limit Checker
Instantly find the maximum claim amount for small claims court in every US state — so you know whether your case qualifies.
Small Text Generator (Superscript, Subscript & Small Caps)
Transform normal text into tiny aesthetic Unicode fonts: superscript small text, subscript baseline letters, and small caps for Instagram bios, Discord handles, and math formulas
Small Wind Turbine Kinetic Power Output & Swept Area Sizer
Client-side interactive engineering calculator for small wind turbine kinetic power output & swept area sizer. 100% private in-browser computation with zero server transit.
Smith Chart Complex Impedance to Reflection Coefficient Converter
Client-side interactive engineering calculator for smith chart complex impedance to reflection coefficient converter. 100% private in-browser computation with zero server transit.
SMPTE 29.97 / 23.976 Drop-Frame & Non-Drop Frame Timecode Math
Client-side interactive engineering calculator for smpte 29.97 / 23.976 drop-frame & non-drop frame timecode math. 100% private in-browser computation with zero server transit.
Soap Making Lye & Water Sizer
Calculate lye (NaOH) weight and water discounts for handmade cold process bar soap with custom superfat percentages.
Sobriety Calculator
Track sober days, money saved, and milestone achievements in recovery
Sobriety Calculator
Enter your quit date and see exactly how long you've been sober — in days, hours, minutes, money saved, and health milestones reached.
Social Media Image Resizer — Platform Banner & Post Dimensions
Resize photos for YouTube, Twitter/X, Instagram, LinkedIn, Facebook, and TikTok online. 100% in-browser canvas cropping with zero server uploads.
Social Security Benefits Calculator
Calculate how delaying your Social Security retirement claim increases your guaranteed lifetime monthly benefit by up to 77%.
Solar Battery Bank Amp-Hour & Storage Sizer
Calculate off-grid solar battery bank capacity in Amp-Hours (Ah) and kilowatt-hours (kWh) for 12V, 24V, and 48V systems based on daily electrical load and autonomy days.
Solar Cable DC Resistance & Max Ampacity Safety Sizer
Client-side interactive engineering calculator for solar cable dc resistance & max ampacity safety sizer. 100% private in-browser computation with zero server transit.
Solar Electric Payback & ROI Sizer
Calculate residential photovoltaic solar panel system costs, annual electric bill offset, and break-even payback timeline.
Solar Inverter Loading Ratio (ILR) & DC Clipping Loss Sizer
Client-side interactive engineering calculator for solar inverter loading ratio (ilr) & dc clipping loss sizer. 100% private in-browser computation with zero server transit.
Solar Panel Bypass Diode Shading Voltage Drop Sizer
Client-side interactive engineering calculator for solar panel bypass diode shading voltage drop sizer. 100% private in-browser computation with zero server transit.
Solar Panel Temperature Derating Efficiency Loss Calculator
Client-side interactive engineering calculator for solar panel temperature derating efficiency loss calculator. 100% private in-browser computation with zero server transit.
Solar Savings Calculator
Find out how much you could save by going solar — with payback period, 10-year savings projection, and break-even analysis for your location.
Solar Water Heater Collector Panel Area & Tank Sizer
Client-side interactive engineering calculator for solar water heater collector panel area & tank sizer. 100% private in-browser computation with zero server transit.
Sourdough Bread Hydration Sizer
Calculate ingredient weights in grams for sourdough loaves using baker’s percentages relative to total flour.
Spain Passport & DNI Photo Maker — Official Foto Carnet Studio
Format compliant foto carnet portraits for Spanish DNI, Pasaporte, and NIE according to Policía Nacional guidelines. Local browser editing with optional cloud cutout.
Specular Glare & Flash Reflection Subtractor
Polarizer filter simulator for photos of glossy coins, oil paintings, and laminated documents. Subtracts specular flash glare hot-spots to reveal underlying engravings and textures.
Speed Converter
Convert between speed units
Spin the Wheel
Customizable random picker wheel with vibrant colors, smooth deceleration physics, and winner history.
Split Image into Grid Tiles Online — Instagram & Panorama Slicer
Split images into rows and columns for Instagram grids and carousel posts. 100% in-browser canvas slicing with ZIP download and zero server uploads.
Split PDF
Break a PDF into separate single-page documents or custom page ranges directly in your web browser. Pack all generated PDF files into an archive zip for download with zero server uploads.
Spot Welding Nugget Diameter & Tip Electrode Force Sizer
Client-side interactive engineering calculator for spot welding nugget diameter & tip electrode force sizer. 100% private in-browser computation with zero server transit.
Spring Wire Coil Rate & Solid Height Deflection Sizer
Client-side interactive engineering calculator for spring wire coil rate & solid height deflection sizer. 100% private in-browser computation with zero server transit.
Spur Gear Dimensions & Involute Calculator
Calculate pitch diameter, base diameter, addendum, dedendum, and root diameter for standard 14.5° and 20° metric spur gears.
SQL DDL Schema to Visual ERD Generator
Parse CREATE TABLE SQL statements and render interactive Entity Relationship Diagrams (ERD) with primary & foreign key links.
SQL Formatter
Format and beautify SQL queries
SQL Playground & Query Runner
Run SQL queries inside your browser on SQLite WebAssembly. Test SELECT, JOIN, and aggregations on sample tables with CSV export
Square Footage & Multi-Room Calculator
Calculate square footage for multiple rectangular and irregular rooms with price estimation.
Squished & Stretched Aspect Ratio Fixer
Restore natural human proportions to squished or stretched photos, CCTV footage, and vintage camcorder video stills with pixel aspect ratio calibration.
SSL Certificate Checker
Check SSL certificate details for any domain
SSL/TLS Certificate X.509 PEM Decoder
Parse X.509 SSL/TLS public certificates, verify Subject Alternative Names (SANs), inspect expiration dates, and key fingerprints.
Stair Stringer Step Rise, Run, Tread & IBC Compliance Sizer
Client-side interactive engineering calculator for stair stringer step rise, run, tread & ibc compliance sizer. 100% private in-browser computation with zero server transit.
Standard Deviation & Variance Calculator
Calculate sample standard deviation, population standard deviation, variance, mean, and step-by-step deviations for any dataset
Standard Deviation, Mean & Variance Sizer
Calculate statistical dispersion metrics including mean, variance, sample standard deviation (s), and population sigma (σ).
Startup Burn Rate & Runway Sizer
Calculate startup cash runway in months, net burn rate, and projected time until required fundraising.
Startup Runway Calculator
Enter your cash balance and monthly burn rate to find out exactly how many months of runway you have — and what changes extend it.
Statute of Limitations Checker
Check time limits and deadlines to file civil and criminal claims by US state
Statute of Limitations Checker
Find out how long you have to file a legal claim — by case type and state — before your right to sue expires.
Statutory Prejudgment & Post-Judgment Daily Interest Calculator
Client-side interactive engineering calculator for statutory prejudgment & post-judgment daily interest calculator. 100% private in-browser computation with zero server transit.
Stepper Motor Step Angle & Microstepping RPM Calculator
Calculate steps per revolution, pulse frequency (Hz), and linear carriage speed (mm/sec) across 1/1, 1/4, 1/16, and 1/32 microstepping motor drivers.
Stepper Motor Steps/mm & Klipper Rotation Distance Calculator
Calculate 3D printer stepper motor steps per millimeter and Klipper rotation distance for leadscrews, belts, and direct-drive extruders.
Stereo Panning Law (0dB, -3dB, -4.5dB, -6dB) Audio Sizer
Client-side interactive engineering calculator for stereo panning law (0db, -3db, -4.5db, -6db) audio sizer. 100% private in-browser computation with zero server transit.
Stereogram Magic Eye 3D Depth Map Image Generator
Create authentic 90s Single Image Random Dot Stereograms (SIRDS) and textured autostereograms. Converge or diverge your eyes on the two alignment dots to see the hidden 3D object pop out!
Sticker Puffy White Border & Die-Cut Maker
Add a smooth, puffy white contour outline around transparent PNG illustrations for Cricut, Silhouette, and Etsy die-cut vinyl stickers.
StockX Seller Fee & Payout Calculator
Calculate your exact net cash payout on StockX after seller level transaction fees (7.0% - 9.0%), 3% payment processing, and shipping.
String Reverser
Reverse any string of text
Structured Settlement Present Value & Cash Discount Sizer
Client-side interactive engineering calculator for structured settlement present value & cash discount sizer. 100% private in-browser computation with zero server transit.
Student Loan Repayment & Payoff Calculator
Calculate monthly student loan payments across standard fixed terms and evaluate how additional monthly principal payments reduce total interest and accelerate debt freedom.
Sublimation Mug & Tumbler Tapered Cone Wrap Distorter
Converts rectangular sublimation artwork into the exact curved fan arc required for tapered 20oz/30oz tumblers. Eliminates diagonal tilting, wrinkled seams, and warped graphics on conical drinkware.
Subtitle SRT & WebVTT Multi-Format Converter
Convert subtitle files between SubRip (.srt) and WebVTT (.vtt) formats with timecode offset shifting and text formatting cleanup.
Sun Altitude, Solar Noon & Golden Hour Lighting Angle Sizer
Client-side interactive engineering calculator for sun altitude, solar noon & golden hour lighting angle sizer. 100% private in-browser computation with zero server transit.
Supercapacitor Bank Energy Storage & Balancing Sizer
Client-side interactive engineering calculator for supercapacitor bank energy storage & balancing sizer. 100% private in-browser computation with zero server transit.
Suspension Roll Center & Wheel Rate Spring Sizer
Client-side interactive engineering calculator for suspension roll center & wheel rate spring sizer. 100% private in-browser computation with zero server transit.
SVG Optimizer & Minifier Studio
Client-side SVG optimizer. Strip editor metadata, clean doctype, round float coordinates, and compress vector markup without visual quality loss.
SVG Optimizer & Sanitizer Studio
Clean and minify SVG markup by stripping redundant metadata, editor comments, unnecessary group tags, and rounding coordinates.
SVG to PNG Converter
Convert SVG files to PNG images
SVG to PNG Converter — Rasterize Vector Graphics Online
Convert SVG vector files to transparent PNG or JPG with custom width and height dimensions. 100% in-browser canvas rendering with zero server uploads.
SVG Wave & Curved Section Divider Generator
Generate smooth organic SVG wave dividers with layered gradient curves, opacity peaks, and clean inline SVG/CSS output.
Swimming Pool Water Volume & Chemical Shock Sizer
Calculate swimming pool water capacity in gallons and liters for rectangular, round, and oval pools alongside standard chlorine shock dosages.
Switzerland Passport & Passfoto Maker — Official 35x45mm Fedpol Studio
Format 35x45mm Swiss Passfoto portraits for passports and ID cards according to Fedpol criteria. Local browser alignment with optional cloud background removal.
Syllable Counter & Readability
Count syllables, words, and readability levels with Flesch Reading Ease and Grade Level metrics.
SysEx MIDI Hardware Synth Patch Librarian & Preset Inspector
Inspect, decode, and extract sound banks from raw System Exclusive (.syx) synthesizer dumps without ancient Windows 98 software. Supports Yamaha DX7 6-operator FM, Roland Juno, and Korg M1.
Tailwind CSS Color Finder
Find matching Tailwind CSS colors for any hex value
Target Heart Rate & Training Zones Calculator
Calculate cardiovascular training zones (Zone 1 to Zone 5) using the Karvonen Heart Rate Reserve (HRR) formula.
Tax Bracket Calculator
Calculate federal marginal vs. effective tax rates and tax bucket breakdowns
Tax Bracket Calculator
Don't fear the next raise. Demystify progressive tax buckets and calculate your real effective tax rate with our 2026 marginal bracket visualizer.
TDEE & Calorie Calculator
Calculate your Total Daily Energy Expenditure and find the exact calorie target for your goal — whether losing, maintaining, or gaining.
TDEE, BMR & US Navy Body Fat Calculator
Calculate Total Daily Energy Expenditure (TDEE), Basal Metabolic Rate (BMR), and cutting/bulking caloric targets using Mifflin-St Jeor and Katch-McArdle formulas.
Telescope Eyepiece Magnification, True Field & Exit Pupil Sizer
Client-side interactive engineering calculator for telescope eyepiece magnification, true field & exit pupil sizer. 100% private in-browser computation with zero server transit.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Term vs. Whole Life Insurance Calculator
Compare Buy Term & Invest the Difference (BTID) vs. Whole Life cash value growth across 10, 20, and 30-year timelines with net wealth advantage analysis
Term vs. Whole Life Insurance Calculator
Discover why 'Buy Term and Invest the Difference' (BTID) mathematically creates hundreds of thousands more liquid wealth than whole life cash value.
Texas Statute of Limitations
Texas personal injury deadline (2 yrs under Tex. Civ. Prac. & Rem. Code § 16.003) and contract deadlines.
Text Diff Checker
Compare two texts and highlight differences
Text Repeater
Repeat text a specified number of times
Text Reverser
Reverse text characters or words
Text Summarizer & Key Sentence Ranker
Extract concise executive summaries and key bullet points from lengthy articles, essays, and reports with adjustable compression ratios and word reduction metrics
Text to ASCII Art
Convert text to ASCII art characters
Text to Binary
Convert text to binary representation
Text to Handwriting Converter
Convert digital typed text into realistic handwritten notebook pages with custom paper and ink styles.
Text to PDF Converter
Convert plain text, notes, and meeting minutes into clean, multi-page paginated PDF documents.
Text to Speech Online
Convert written text into natural speech voiceovers with voice selection and pitch controls.
Text to URL Slug
Convert text to URL-friendly slugs
Text Truncator
Truncate text to a specific character or word count
Thermal Barcode Dead-Pin Gap Repairer (Fix White Banding)
Detect and bridge microscopic 1-pixel dead-pin white vertical scratches through thermal printer barcodes so FedEx, UPS, and laser scanners can read the label.
Thermal Expansion Linear Pipe Growth & Loop Sizer
Client-side interactive engineering calculator for thermal expansion linear pipe growth & loop sizer. 100% private in-browser computation with zero server transit.
Thermal Infrared Color-Scale Heatmap Inspector
Inspect FLIR and infrared thermal camera photos without expensive software. Interactive spot-temperature eyedropper and ironbow scale calibration.
Thermal Receipt Printer 1-Bit Ditherizer
Convert photos using Atkinson and Floyd-Steinberg dithering algorithms calibrated for 58mm, 80mm, and 4x6 thermal receipt printers (Phomemo, PeriPage, Rollo).
Thick PDF Booklet Binding Creep Compensator
Calculate and apply progressive gutter shingling across thick booklet pages (24, 32, 48 pages) so inner page margins never get sheared off when edge-trimmed with a guillotine cutter.
Thiele-Small Subwoofer Enclosure Volume & Tuning Calculator
Client-side interactive engineering calculator for thiele-small subwoofer enclosure volume & tuning calculator. 100% private in-browser computation with zero server transit.
Tile & Grout Sizer
Calculate the exact number of tiles, tile boxes, and grout pounds needed for floors, bathrooms, and backsplashes.
Timber Beam Uniform Load & Bending Moment Calculator
Client-side interactive engineering calculator for timber beam uniform load & bending moment calculator. 100% private in-browser computation with zero server transit.
Time Duration & Clock Difference Calculator
Calculate elapsed time in hours, minutes, and seconds between clock times with midnight crossover.
Time-Lapse Interval, Event Duration & Memory Card Sizer
Client-side interactive engineering calculator for time-lapse interval, event duration & memory card sizer. 100% private in-browser computation with zero server transit.
Timelapse Interval & Clip Duration Sizer
Calculate exact camera intervalometer settings to turn real-world events into smooth cinematic timelapse clips.
Timezone Converter
Convert times between different timezones
Timing Belt & Pulley Center Distance Calculator
Calculate exact center-to-center distance between pulleys, belt teeth count, and teeth in mesh for GT2, HTD, and XL timing belts.
Tip Calculator
Calculate tips and split bills
Tire & Wheel Size Comparison Calculator
Compare two tire and wheel sizes side-by-side. Calculate differences in diameter, sidewall height, circumference, revs per mile, and speedometer error.
Tire Diameter, Aspect Ratio & Speedometer Error Calibrator
Client-side interactive engineering calculator for tire diameter, aspect ratio & speedometer error calibrator. 100% private in-browser computation with zero server transit.
Tire Size & Speedometer Offset Sizer
Compare old vs new automotive tire sizes to see speedometer error percentage, ride height delta, and diameter difference.
Title & Meta Description Checker
Check page title and meta description lengths
Toroidal Ferrite & Powdered Iron Inductor Turns Sizer
Calculate required winding turns, AL inductance factors, and wire length for toroidal ferrite and powdered iron inductors.
TOTP & 2FA Code Generator
Generate TOTP codes for two-factor authentication
Traditional IRA Calculator
Estimate annual upfront tax deductions and tax-deferred investment accumulation in a Traditional IRA.
Trailer Tongue Load & Safety Sizer
Ensure safe towing and prevent deadly highway trailer sway by calculating tongue weight ratio.
Transmission Gear & RPM Speed Sizer
Calculate cruising speed and engine RPM based on transmission gear ratios, rear end differential, and tire height.
Transmission Gear Ratio to Vehicle Speed & RPM Calculator
Client-side interactive engineering calculator for transmission gear ratio to vehicle speed & rpm calculator. 100% private in-browser computation with zero server transit.
Transparent PNG Alpha Halo & Matte Defringe Cleaner
Removes ugly white, black, or gray pixel halos from transparent PNGs, stickers, and cutouts by unclamping premultiplied alpha fringes and rebuilding edge colors.
Transparent Signature Extractor & Paper Cleaner
Extract handwritten signatures from photos on paper, remove paper texture and shadows, and export a clean transparent PNG or vector for signing documents.
Triangle Geometry & Trig Solver
Solve right, isosceles, and scalene triangles given three sides (SSS) or side-angle combinations.
Trim Video Online
Cut and trim video clips to exact start and end timestamps directly inside your browser.
True PDF Vector Blackout & Client-Side Redaction Proof Sizer
Client-side interactive engineering calculator for true pdf vector blackout & client-side redaction proof sizer. 100% private in-browser computation with zero server transit.
True Vectorizer: Blurry PNG to Scalable SVG Paths
Convert blurry, pixelated logos and artwork into authentic scalable vector SVG files with real mathematical paths for printing and embroidery.
Turbocharger Pressure Ratio & CFM Compressor Flow Matcher
Client-side interactive engineering calculator for turbocharger pressure ratio & cfm compressor flow matcher. 100% private in-browser computation with zero server transit.
Turkey Passport & Biometric Photo Maker — Official 50x60mm Studio
Format 50x60mm Turkish biyometrik fotoğraf for passports and kimlik kartı according to NVİ standards. Client-side canvas alignment with optional cloud cutout.
Twitter Card Previewer
Preview how your page appears as a Twitter card
Typing Speed Test
Test typing speed in Words Per Minute (WPM) and accuracy with timed challenges
Typing Speed Test
Test your WPM and accuracy with a timed typing challenge — with difficulty levels, progress tracking, and a shareable result certificate.
UAE Passport & Visa Photo Maker — Official 43x55mm ICP Studio
Format 43x55mm photos for UAE passport, Emirates ID, and residency visas adhering to ICP standards. Client-side editing with optional cloud background removal.
Ubify Developer Shell & Web CLI
Interactive in-browser UNIX terminal. Execute commands to generate UUIDs, encode Base64, inspect routes, and launch developer utilities.
Ubify vs Adobe Acrobat Online
In-Browser PDF Processing Alternative to Adobe Acrobat Online
Ubify vs Browserling
Client-Side Developer Suite Alternative to Browserling Tools
Ubify vs Calculator.net
Ad-Free Interactive Alternative to Calculator.net with Real-Time Updates
Ubify vs Canva Photo Editor
The Instant, No-Signup Alternative to Canva's Photo Editor
Ubify vs CloudConvert
Client-Side File Conversion Alternative to CloudConvert
Ubify vs CyberChef
Dedicated Single-Task Developer Alternative to CyberChef Recipes
Ubify vs EZGIF
In-Browser Image & GIF Studio Alternative to EZGIF
Ubify vs iLovePDF
Client-Side In-Browser Alternative to iLovePDF
Ubify vs PDF24
In-Browser WebAssembly Alternative to PDF24
Ubify vs Photopea
The Lightweight, Distraction-Free Alternative to Photopea
Ubify vs PhotoRoom
Free PhotoRoom Alternative for Watermark-Free Subject Cutouts
Ubify vs Remove.bg
Credit-Free Full-Resolution Alternative to Remove.bg
Ubify vs Sejda PDF
Unlimited Task Alternative to Sejda PDF
Ubify vs SmallPDF
In-Browser PDF Processing Alternative to Smallpdf
Ubify vs SmallSEOTools
Ad-Free Alternative to SmallSEOTools with Zero Word Limits
Ubify vs Squoosh
Client-side image compression alongside batch and document tools
Ubify vs TheCalculatorSite
Client-side calculators with real-time recalculation
Ubify vs TinyPNG
In-browser image compression without external upload queues
Ubify vs TinyWow
Web utility tools without file waiting queues
Ubify vs Wolfram Alpha
Dedicated formula calculators without subscription paywalls
UK Passport Photo Maker — Official 35x45mm HMPO Studio
Format 35x45mm UK passport photos according to HM Passport Office guidelines. Local browser alignment with optional cloud background removal.
Unit Converter
Convert between length, weight, and temperature units
Universal CSV to JSON, SQL & Markdown Converter
Convert messy CSV spreadsheets into clean JSON arrays, SQL INSERT batches, Markdown tables, or TSV data with type inference.
Universal Language Translator Studio
Translate text instantly between 50+ languages with text-to-speech pronunciation, tone adjustment, and split-screen comparison
Universal Transverse Mercator (UTM) to Latitude Longitude Converter
Client-side interactive engineering calculator for universal transverse mercator (utm) to latitude longitude converter. 100% private in-browser computation with zero server transit.
Universal Unit Multi-Matrix Converter
Instantly convert between metric, imperial, and scientific units across length, weight, temperature, pressure, digital data, and energy.
Unix Timestamp Converter
Convert between Unix timestamps and dates
Unlock PDF
Remove permission restrictions and rebuild PDF containers in your web browser. Note: This tool re-indexes document streams without encryption flags; heavily ciphered AES user passwords cannot be decrypted client-side.
URL Encoder & Decoder
Encode or decode URL components
URL Parser
Parse and break down URL components
URL Shortener
Create shortened URLs
US CPI Inflation & Historical Purchasing Power Calculator
Calculate how price inflation has altered consumer purchasing power between 1913 and 2026 using official Consumer Price Index (CPI-U) data.
US FEIE 330-Day Physical Presence Sizer
Track the IRS 330 full-day physical presence test in any 365-day period to legally exclude foreign earnings from US federal tax.
US Passport Photo Maker — Official 2x2 Inch Studio
Format 2x2 inch (51x51mm) US passport and visa photos meeting Department of State standards. In-browser alignment with optional ephemeral cloud background removal.
US Visa Photo Maker — Official 2x2 Inch Online Studio
Create US visa photos (B1/B2, DS-160) that meet 2025 State Department requirements. 2x2 inch, white background. 100% private.
User-Agent Inspector & Client Hints Analyzer
Parse and inspect browser User-Agent strings, engine versions, platform architecture, and modern Client Hints (Sec-CH-UA).
Username Generator
Generate cool, aesthetic handles and usernames for Instagram, TikTok, Discord, and Twitch.
UUID & GUID Generator
Generate random UUIDs and GUIDs
UUID Generator (Crypto)
Generate cryptographically secure UUIDs
UUIDv4 & UUIDv7 Microsecond-Ordered Generator
Batch generate RFC 9562 compliant UUIDv7 timestamp-ordered and UUIDv4 random identifiers with bulk copy & export options.
VA Mortgage Calculator
Calculate monthly VA home loan payments for military service members and veterans, including 0% down financing, VA funding fee schedules, and zero monthly PMI.
Vacuum Chamber Pump-Down Time & Pumping Speed Sizer
Client-side interactive engineering calculator for vacuum chamber pump-down time & pumping speed sizer. 100% private in-browser computation with zero server transit.
VAT Calculator (Inclusive & Exclusive)
Calculate Value Added Tax (VAT) additions and deductions for UK (20%), EU (19-25%), and international trade.
Venturi Scrubber & Fluid Meter Throat Velocity Calculator
Client-side interactive engineering calculator for venturi scrubber & fluid meter throat velocity calculator. 100% private in-browser computation with zero server transit.
Video Aspect Ratio Letterbox & Fit Studio
Calculate exact letterbox padding and canvas scaling to convert 16:9 widescreen videos to 9:16 vertical TikTok/Reels or 1:1 square.
Video Recording File Size & Bitrate Calculator
Calculate video storage requirements across 1080p, 4K, and 8K in Apple ProRes 422, H.264, H.265/HEVC, and AV1 formats.
Video Speed Controller
Adjust video playback and export speed from 0.25× to 4× directly inside your browser.
Video Subtitle (.srt / .vtt) to Formatted Dialogue Script PDF
Strip numeric timecode arrows from .srt and .vtt subtitle files and format dialogue into clean, screenplay-style printable study script PDFs.
Video Target File Size & Bitrate Calculator
Calculate optimal video and audio bitrates to compress video clips under exact size limits (8MB Discord, 25MB email, 100MB web).
Video to GIF Converter
Convert video clips into high quality animated GIFs with custom FPS, width, and looping options.
Virtual Coin Flipper & Toss Simulator
Flip a virtual coin 1 to 100 times to simulate fair coin tosses and statistical probability distribution.
Virtual Dice Roller (d4, d6, d8, d10, d12, d20, d100)
Roll virtual polyhedral dice for Dungeons & Dragons, Pathfinder, and tabletop games with modifiers.
Visible Date/Time & GPS Coordinate Photo Watermarker
Burn visible industrial yellow timestamp timecode and GPS latitude/longitude coordinates directly into photo pixels for insurance damage and job-site proof.
Visual Cron Expression Studio & Next-Trigger Simulator
Visual 5-part cron syntax builder with plain English translations, platform snippets, and upcoming execution timeline simulator.
Visual Cron Schedule Designer & Human Explainer
Interactive cron matrix builder with plain English translations, timezone offsets, and upcoming execution timeline preview.
Visual Reaction Time & Reflex Tester
Measure your visual reaction time in milliseconds with precision high-resolution performance timers and percentile ranking.
Visual Regex Explainer & Live Tester
Deconstruct and visualize regular expressions token-by-token in plain English with real-time pattern matching against test inputs.
Visual robots.txt Generator & AI Bot Controller
Build optimized, clean robots.txt rules visually: set crawl delays, configure allow/disallow paths, block AI scrapers (GPTBot, CCBot, Claude-Web), and link XML sitemaps
Visual Subnet Mask & CIDR IP Calculator
Calculate IPv4 subnet boundaries, network addresses, broadcast addresses, usable host ranges, and subnet masks from any IP and CIDR prefix.
Voice to Text & Audio Transcriber
Convert spoken voice into editable text in real-time. Live in-browser speech recognition with waveform visualizer and unlimited dictation.
Volume Booster Online
Boost and amplify audio volume up to 400% with digital gain and soft clipping protection.
Wallpaper Roll Quantity & Drop Repeat Calculator
Calculate wallpaper rolls needed accounting for room dimensions, pattern repeat drops, doors, windows, and waste factor.
Water Heater First-Hour Rating (FHR) Sizer
Estimate required residential water heater tank size and First-Hour Rating (FHR) based on simultaneous showers, sink usage, and appliance demand during your busiest hour.
Watermark Adder
Add text watermarks to images
Watermark PDF
Add centered text stamps across every page of your PDF document directly in your browser. Configure custom text strings, font size, opacity transparency, and rotation angles with zero server uploads.
WCAG 2.2 Color Contrast Matrix & APCA Analyzer
Test text and background color pairs against WCAG 2.1 AA and AAA accessibility contrast thresholds with instant ratio scoring.
WebP to JPG Converter — Convert WebP to Universal JPEG
Convert WebP images to universally compatible JPEG format in your browser. Batch processing with quality sliders and ZIP download. Zero server uploads.
WebP to PNG Converter — Preserve Alpha Transparency
Convert WebP images to lossless PNG format with 100% alpha transparency preserved. In-browser canvas decoding with batch ZIP export and zero uploads.
Website Screenshot
Take a screenshot of any website
Website Technology Detector
Detect technologies used by a website
Website Value Estimator
Estimate what your website is worth based on monthly traffic, niche, and monetization — using industry-standard valuation multiples.
Wedding Budget Breakdown & Estimator
Estimate wedding expense allocations across venue, catering, photography, florals, and attire using standard industry percentage baselines and per-guest metrics.
Weighted & Unweighted GPA Calculator
Calculate cumulative weighted GPA on a 5.0 scale alongside standard 4.0 unweighted GPA, factoring in AP, IB, and Honors grade point additions.
Welding Heat Input (kJ/in) & Weld Interpass Temperature Sizer
Client-side interactive engineering calculator for welding heat input (kj/in) & weld interpass temperature sizer. 100% private in-browser computation with zero server transit.
Wet Brine Salt Ratio & Salinity Calculator
Calculates kosher salt mass and cup measurements for wet meat brines based on water volume and salinity percentage.
WhatsApp Sticker Maker
Create official 512×512 WebP WhatsApp stickers from photos and transparent graphics.
WhatsApp Voice Note to Standard Audio Converter
Convert WhatsApp .opus and .ogg audio notes into universally playable 16-bit PCM WAV/MP3 files for court evidence, visa submissions, and legal records.
Whitespace Remover
Remove extra whitespace from text
Whois Lookup
Look up domain registration information
Window Blinds Measurement Sizer
Calculate exact ordering measurements for custom horizontal and roller window blinds with standard clearance allowances.
Wine Chaptalization Sugar Sizer
Calculate chaptalization sugar additions to raise low-sugar grape must to target potential alcohol levels.
Wood Species Moisture Shrinkage & Seasonal Expansion Sizer
Client-side interactive engineering calculator for wood species moisture shrinkage & seasonal expansion sizer. 100% private in-browser computation with zero server transit.
Word & Character Counter
Count words, characters, sentences, and paragraphs
Word Count
Extract text streams from your PDF document in your browser to inspect word count, total characters, characters excluding spaces, page count, and paragraph totals without transmitting files over the internet.
Word to PDF
Convert Microsoft Word (.docx) documents into clean, standardized PDF files directly in your browser.
Word Unscrambler
Unscramble letter tiles into valid English words with Scrabble scores and prefix/suffix filters.
Wordle Game
Play the classic 5-letter daily word guessing puzzle in your browser
Wordle Game
Guess the 5-letter word in 6 tries — a new daily puzzle every day, with streak tracking, statistics, and a shareable emoji result grid.
Work Hours & Time Card Calculator
Calculate daily and weekly work hours, break deductions, overtime pay, and gross earnings with printable timesheet export
XML Sitemap Generator
Generate XML sitemaps from a list of URLs
XML to CSV
Convert XML data to CSV format
XML to JSON
Convert XML data to JSON format
Yagi-Uda Antenna Director & Reflector Spacing Sizer
Client-side interactive engineering calculator for yagi-uda antenna director & reflector spacing sizer. 100% private in-browser computation with zero server transit.
YAML to JSON
Convert YAML data to JSON format
YouTube AdSense Earnings & RPM Calculator
Estimate your monthly YouTube channel earnings based on daily views, audience country, and niche RPM / CPM rates.
YouTube Banner Maker
Create official 2560×1440 YouTube banners with interactive desktop and mobile safe-area guidelines.
YouTube Channel Name Generator
Discover catchy, brandable, and available YouTube channel names by niche and style with instant copy.
YouTube Tag Generator
Generate high-ranking YouTube video tags and SEO keywords with a 500-character budget counter.
YouTube Thumbnail Downloader
Download full HD, 4K, and standard definition YouTube video thumbnails from any video link or ID.
YouTube Thumbnail Maker
Design 1280×720 YouTube thumbnails with bold text layers, stickers, and safe-area overlays.
Z-Score & Normal Distribution Calculator
Calculate standard normal distribution Z-scores and corresponding percentile ranks from population mean and standard deviation.
Zakat Calculator
Calculate annual Islamic Zakat on gold, silver, cash, and business inventory against current Nisab thresholds.
Zodiac Compatibility Calculator
Compare astrological relationship compatibility across romance, communication, and trust ratings.
Why In-Browser Processing Keeps Your Files Private
Unlike legacy online utilities that upload sensitive PDFs, confidential contracts, API keys, and personal photos to remote cloud servers, Ubify Tools executes all conversions, formatting, compression, and computer vision locally in your web browser using WebAssembly and Web Worker threads. Your data never touches a server.