🔑JWT DecoderLIVE

🔒 Decoded entirely in your browser — nothing sent to a server

Paste a JWT

Never leaves your browser. Tokens and signing secrets are decoded and verified in this tab only. They are never uploaded, never written to a share URL, and never stored.

Load an example

Check against expectations

A verifying service must pin the issuer and audience it accepts. Enter the values yours expects and any mismatch is reported as an error.

Expected issuer (iss)

Expected audience (aud)

Clock skew (seconds)

Paste a token above, or load an example, to see its security status.

💡 JWTs are not encrypted — anyone can decode the header and payload without a secret. Never put sensitive data (passwords, secrets) in a JWT payload. Only the signature proves the token wasn't tampered with, and only if you verify it.