JWT Decoder
Decode and inspect JSON Web Token headers, payloads and timing claims. Tokens are processed locally in your browser.
JWT Token
Header
Payload
Claims Summary
About JWT Decoding
A JSON Web Token has three Base64URL encoded parts: header, payload and signature. The header describes the algorithm, the payload contains claims, and the signature proves authenticity when verified with the correct key.
Common claims
sub— subject/user identifier.iss— issuer.aud— audience.iat— issued-at timestamp.exp— expiry timestamp.
Privacy
Decoding is done entirely client-side.