Developer Tools
Free, fast, and private developer utilities — all processing happens in your browser
JSON Formatter
Format, validate, minify, and explore JSON data with tree view and statistics. Supports drag-and-drop, URL loading, and real-time error detection.
UUID Generator
Generate UUID v1, v4, and v7 identifiers with bulk generation, format options, and one-click copy. RFC 9562 compliant.
JWT Decoder
Decode, inspect, verify, and generate JSON Web Tokens. Claims inspector with expiry detection, HMAC signature verification, and token builder.
Cron Expression
Parse cron expressions into plain English, build schedules visually, and preview next execution times. Supports standard 5-field cron syntax with presets.
Regex Tester
Write, test, and debug regular expressions with real-time match highlighting, capture group inspection, and replace preview. All JavaScript flags supported.