Run Unix command-line stream operations (`grep`, `sort`, `uniq`, `head`, `tail`) directly inside your web browser without opening a terminal, configuring shell environments, or uploading log files. This utility allows developers, system administrators, and data analysts to inspect log files, extract structured records, deduplicate datasets, and apply regex filters locally.

### Available Stream Operations

- **Regex Grep Filter (`grep`):** Filter lines using standard JavaScript regular expressions or plain-text substrings. Includes Case Insensitive (`-i`), Invert Match (`-v`), and Line Numbering (`-n`). - **Sorting & Ordering (`sort`):** Sort lines alphabetically, by string length, or using natural numerical ordering (`sort -n`) that correctly sequences numbers like 2 before 10. - **Line Deduplication (`uniq`):** Eliminate duplicate adjacent or global lines (`sort -u`) to isolate unique identifiers and error traces. - **Line Slicing (`head` & `tail`):** Extract the first $N$ lines or last $N$ lines of voluminous log dumps. - **Entity Extraction:** Instant regex extractors pull unique email addresses, web URLs, IPv4 addresses, and UUIDs from raw unstructured text.

### Worked Stream Processing Example

Filtering a raw web server access log to isolate failed authentication attempts: 1. Paste 500 lines of Nginx access logs into the input console. 2. Select the **Grep** mode and input the regex pattern `POST /api/v1/auth 401`. 3. Check **Invert Match** off and **Line Numbers** on. 4. Output displays only the matching unauthorized requests with their original line indices preserved. 5. Click **Extract IPs** to extract all unique client IP addresses associated with the authentication failures.

### Local Privacy Guarantee

All stream parsing, regular expression matching, and line sorting occur strictly in your device memory via client-side JavaScript. Server logs, proprietary configuration files, and authentication records never leave your browser.