Developer Tools

Free, privacy-friendly browser tools. No data leaves your device.

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Client-side

Diff Checker — Free Online Tool

Compare two text blocks side-by-side and see differences highlighted line by line. Free browser-based diff viewer.

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Client-side

Hash Generator — Free Online Tool

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. Uses the browser's native SubtleCrypto API — no data leaves your browser.

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Client-side

HTML Formatter & Minifier — Free Online Tool

Beautify or minify HTML instantly in your browser. Includes an HTML Quick Reference for divider lines, comments, blink, marquee, and more — free, no server uploads.

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Client-side

JWT Decoder — Free Online Tool

Decode and inspect JWT tokens instantly in your browser. Parses header, payload, and shows expiry. No verification — client-side only.

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Client-side

README Generator — Free Online Tool

Generate a professional README.md template for your project instantly. Choose your project type, license, and sections — get ready-to-use Markdown.

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Client-side

Regex Tester — Free Online Tool

Test regular expressions against text with real-time match highlighting. See all matches, groups, and an explanation of your pattern.

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Client-side

SQL Formatter — Free Online Tool

Format and beautify SQL queries instantly in your browser. Includes a SQL Quick Reference for COALESCE, window functions, GROUP BY, HAVING, and more — free, no server uploads.

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Client-side

URL Encoder/Decoder — Free Online Tool

Free online URL encoder and decoder — encode and decode URLs, query strings, and percent-encoded characters instantly in your browser. No install needed.