JWT decoder

Decode JSON Web Tokens and inspect header, payload, and expiry.

Runs on your deviceFreeNo account

How to use JWT decoder

Paste three base64url segments separated by dots. The header and payload pretty-print. Expired tokens are flagged. Signature bytes are shown but not validated, because verification needs the issuer’s key.

Paste a JWT to see its JSON header and payload, including iat/exp as human dates. This tool does not verify signatures — never paste a secret in a website you do not trust. Omnipus decodes locally.

Also searched as jwt decoder, decode jwt, jwt parser. All processing for this tool happens in your tab unless labeled otherwise.

Questions

Is decode the same as verify?

No. Anyone can decode a JWT. Verification proves it was signed by the issuer.

Safe to paste production tokens?

Avoid live access tokens. Use samples. Decoding is local, but treating secrets carefully is still wise.

Encrypted JWE?

Not supported. This reads standard JWS tokens.

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