JWT Generator — free online tool
If you've ever worked with logins or APIs, you've run into JWTs — those long tokens that carry a bit of signed data. Reading one by eye is a pain, and building a fresh one to test something is fiddly. We added a free tool that does it — JWT Generator — right in your browser.
What it does
You can build and sign a JWT using HMAC-SHA256: fill in the header and payload, add your secret, and get a finished token. You can also go the other way — paste a token you already have and it splits out the header and payload so you can read what's inside.
Nothing leaves your device
Everything happens in your browser. Your tokens, your secret, and your data are never uploaded or saved anywhere. Close the tab and nothing is left behind.
How to use it
- Open JWT Generator and choose to build a token or paste one to decode.
- To build: fill in the payload and your secret key; to decode: paste the token.
- Copy the signed token, or read the decoded header and payload.
It's free with no limit. There are more small tools on the Apps page.