JWT Decoder
Runs in browserInspect JWT headers and payloads without sending tokens away
Validators
3 tools
Regex Tester
Runs in browserTest regular expressions and inspect every match
Text Diff Checker
Runs in browserCompare two texts and see line-by-line changes
ABOUT US
Small tools, built for the web.
Utilities that run entirely in your browser. No install, no signup, and your data never leaves your machine.
FAQ
Questions, answered.
Are all tools in this category free?＋
Yes. Every tool runs entirely in your browser, works without an account and costs nothing. Just open the page and use it.
Do these tools share my data with anyone?＋
No. All processing happens locally on your device. Nothing you type or paste ever leaves your browser.