JWT Decoder

JWT Decoder helps users inspect the structure of a JSON Web Token by decoding its header and payload in a readable format. This is useful for debugging authentication flows, checking claims, and understanding token content during development.

The tool can reveal common fields such as algorithm, token type, subject, issuer, audience, and expiration timestamps without needing a backend or external service.

It is important to remember that decoding is not the same as verification. A decoded JWT may still be invalid, expired, unsigned correctly, or unsafe to trust.