Developer
Tools Hub

A comprehensive suite of beautiful, fast, and intuitive developer utilities. Format JSON, decode JWTs, hash strings, test regex, format SQL, build cron expressions, and 22 more tools — all 28 running entirely in your browser.

Privacy First
Client-Side Only
Lightning Fast

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

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Open the tool menu to explore all 28 utilities and boost your productivity.