JWT Decoder Online
Inspect your JSON Web Tokens. Decode the header and payload instantly to debug authentication and view data claims.
Security Notice
While this tool runs 100% in your browser and never sends your data to a server, we recommend never pasting sensitive production tokens into any online tool.
Awaiting Token
Paste a JWT on the left to see the decoded header and payload.
Debug Your Authentication Tokens
JSON Web Tokens (JWT) are the standard for modern web security. Our JWT Decoder allows you to quickly view the 'claims' embedded in your tokens, such as user IDs, permissions, and expiration dates.
By decoding the Base64Url encoded sections, you can ensure that your server is issuing the correct data and that your authentication flow is working as expected.