DevTools Suite
Beautiful developer utilities
Developer
Tools Hub
A comprehensive suite of beautiful, fast, and intuitive developer utilities. Format JSON, decode JWTs, hash strings, convert formats, and more.
100% Privacy
All tools run locally in your browser. Your data never leaves your device.
Lightning Fast
Instant processing with no server round-trips. Everything happens locally.
Works Offline
Once loaded, all tools work without an internet connection.
Open Source
Built with modern web technologies. Contribute on GitLab!
Popular Tools
Quick access to the most used developer utilities
JSON Tools
Format, validate, and convert JSON
Base64
Encode and decode Base64
JWT Decoder
Decode and verify JWT tokens
Password Generator
Generate secure passwords
Color Tools
Color picker and converter
Code Formatter
Format JavaScript, CSS, HTML
Diff & Merge
Compare text and perform three-way merges
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