About the JWT Decoder
The JWT Decoder reads Base64URL header and payload sections, parses their JSON and converts standard exp, nbf and iat numeric dates for convenience. Decoding alone does not authenticate the token or verify its signature.
How to use the JWT Decoder
- Paste the complete three-part token.
- Decode the first two sections.
- Inspect claims only as untrusted data until a trusted server verifies the signature.
Practical tips
- Never paste a live bearer token on a device you do not trust.
- Authorization decisions must use verified algorithm, key, issuer and audience checks.