Dev Tools
JSON Formatter & Validator
Format, validate and minify JSON online. All client-side, nothing sent to server.
Built these tools for my own daily development use over the years — sharing them freely with the community. All processing is 100% client-side; nothing is sent to any server.
JSON Formatter & Validator
Input
Output
Base64 Encoder / Decoder
Input
Output
JWT Decoder
Token
Client-side decode only. Signature NOT verified. Never paste tokens with real user data.
UUID v4 Generator
URL Encoder / Decoder
Input
Output
Password Generator
Regex Tester
Pattern
Flags
Test string
Text Diff
Original
Modified