Developer Tools
Format JSON, decode JWTs, test regex, build cron expressions, minify code.
JSON Formatter & Validator
Pretty-print, minify and validate JSON with line-accurate error messages.
JWT Decoder
Decode a JWT token to view its header, payload and expiry — client-side only.
Regex Tester
Test regular expressions with live match highlighting and group capture.
Cron Expression Builder
Build and explain cron expressions with a live human-readable preview.
HTML / CSS / JS Minifier
Minify HTML, CSS and JavaScript to reduce file size for production.