How to use JWT Decode Online
- Drop your JWT into the field at the top of JWT Decode Online.
- Watch the output update instantly while you adjust the JWT.
- When it looks right, Copy to save it.
About this tool
JWT Decode Online runs entirely in your browser. JWT Decode Online splits and base64url-decodes a JWT locally so you can inspect its claims.
The token is parsed on your device and never transmitted. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
What does JWT Decode Online do?
JWT Decode Online lets you decode your input right in the browser, with the result shown instantly and nothing uploaded.
Does JWT Decode Online cost anything?
No — JWT Decode Online is completely free, with no sign-up and no hidden limits.
Does JWT Decode Online upload my data?
No — JWT Decode Online processes everything locally in your browser, so nothing you enter is uploaded or stored.
Does JWT Decode Online verify the JWT signature?
JWT Decode Online decodes the token locally so you can inspect its header and payload; verification needs the matching key.
Does JWT Decode Online work offline?
Once the page has loaded, JWT Decode Online keeps working with no network connection.