JWT Decoder

Decode the header and payload of a JWT (JSON Web Token) in your browser. Your token is never sent anywhere.

Decoding happens entirely in your browser — the token is never sent anywhere. Signatures are not verified.

How to use

  1. Pick the tool you want to use.
  2. Enter your input or adjust the options.
  3. Copy or download the result.

FAQ

Is it free to use?

Yes. All features are free with no usage limits, and no account is required.

Is my input sent to a server?

No. Everything runs locally in your browser — your data never leaves your device.

Does it work on smartphones?

Yes. It works on both desktop and mobile with modern browsers such as Chrome, Edge, Firefox and Safari.