Free Online JWT Decoder & Debugger Tool

Instantly decode and inspect JSON Web Tokens locally in your browser. Secure, fast, and visual.

Client-Side Security

Data processing happens entirely in your browser's memory. No tokens or secrets are ever sent to a server.

Header Algorithm & Type

Enter a token to see the header...

Payload Claims & Data

Enter a token to see the payload...

Signature

The signature is used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.

HMACSHA256(...)
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