JWT Decoder

Runs locally

Decode JSON Web Tokens locally: inspect the header, payload claims and expiry — the token never leaves your browser.

JWT token

Paste a JSON Web Token to instantly decode its header and payload. Registered claims (iss, sub, aud, exp, nbf, iat, jti) are explained, and timestamps are converted to readable dates with live expiry status. Decoding happens entirely in your browser — the token is never transmitted. Note: this tool decodes but does not verify signatures.

JWT Decoder

Header

Payload

Registered claims

Signature