JWT Decoder
Decode a JWT's header and payload.
Free · No sign-up · Works in your browser
Decoding only — signatures are not verified.
Header
Header JSONPayload
Payload JSONAbout the JWT Decoder
Free JWT decoder — decode and inspect the header and payload of a JSON Web Token. Decoding only; nothing is sent anywhere.
How to use the JWT Decoder
- 1Paste your JWT.
- 2Read the decoded header and payload as formatted JSON.
- 3Inspect claims like exp, iat, and sub.
Frequently asked questions
Does this verify the signature?
No — it only decodes the token for inspection. It does not validate the signature, so never trust decoded claims without server-side verification.
Is my token sent to a server?
No. Decoding happens entirely in your browser.