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.
Drop your PDF here
or click to browse
Convert JPG, PNG, WEBP, remove backgrounds, upscale, and resize with instant client-side WebAssembly.
How to Use
- 1Select or drag your PDF document into the upload dropzone.
- 2Review the detected initial document byte size in the control area.
- 3Click Compress PDF to strip metadata and compact dictionary streams using pdf-lib.
- 4Compare the original size against the newly optimized byte weight.
- 5Click Download Compressed PDF to save the streamlined document.
Frequently Asked Questions
How does the in-browser PDF compressor reduce file size?
The tool strips unneeded document metadata tags (including author, title, subject, and producer strings) and recompiles the PDF using object streams, which packs repeated structural tokens into compressed binary blocks.
Does this tool alter the visual text or degrade vector lines?
No. Because compression focuses on structural dictionary repacking and metadata removal, your document text and vector layout remain perfectly sharp.
Are my sensitive business documents uploaded to an external server?
No. The entire optimization executes locally inside your web browser memory. Zero document bytes are transmitted across the network.
Can I compress an already optimized PDF?
If a PDF has already been stripped of metadata and compiled with object streams, further structural reduction will be minimal.