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Jwt Decoder
Decode JWT tokens to view header and payload (base64 decode only).
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It decodes the header and payload of a JWT (JSON Web Token) from base64url and displays them as readable JSON. It does not verify the signature or validate claims.
Developers debugging auth flows, support staff checking token contents (e.g. expiry, user id), or anyone who needs to inspect JWT contents without verifying them.
Signature is not verified. Never trust decoded data for security decisions. Do not paste production tokens with sensitive claims in shared or unsecured environments.
No. Decoding runs in your browser. The token is not sent to any server.
Paste the full token (header.payload.signature). If decoding fails, check that the token is not truncated and has three base64url parts separated by dots.
