Free developer tools that run entirely in your browser
No sign-up, no file uploads, no data leaves your device. Format JSON, test regex, build cron expressions, generate passwords, and more — instantly.
JSON Formatter & Validator
Beautify, minify, and validate JSON with clear error locations.
Regex Tester
Test regular expressions against sample text with live match highlighting.
Cron Expression Builder
Build and decode cron schedules in plain English.
Password & UUID Generator
Generate strong random passwords and UUID v4 identifiers.
Base64 Encoder / Decoder
Encode and decode text or files to and from Base64.
Color Converter
Convert between HEX, RGB, and HSL with a live preview swatch.
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