FREE • CLIENT-SIDE • NO SIGNUP
Essential Developer Utilities
Fast, privacy-first web utilities that run 100% inside your browser. No server uploads, no trackers, and no signup needed.
JSON & Data
Free JSON Formatter & Validator
Beautify, validate, format, and minify JSON data instantly with client-side syntax error detection.
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RegExp
Regex Tester & Match Debugger
Test regular expressions with real-time match highlighting, flags (g, i, m, s), and common presets.
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Encoding
Base64 Encoder & Decoder
Convert UTF-8 text to standard Base64 and URL-safe Base64URL formats privately in your browser.
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Crypto & IDs
UUID v4 Generator Online
Generate cryptographically secure RFC 4122 version 4 UUIDs and GUIDs in batches with casing controls.
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