JWT Decoder
Decode JWT headers and payload claims instantly. Useful for debugging auth flows and verifying token expiry during development.
- Decode header and payload without uploading tokens.
- Quickly inspect exp/iat/nbf claims.
- Helps validate scopes, roles, and audiences.
- Client-side parsing for privacy.
FAQ
Does this verify the JWT signature?
Decoding is not verification. Signature verification requires the secret/public key and algorithm.
Is it safe to paste production tokens?
Prefer using non-sensitive tokens. This tool runs in-browser, but treat JWTs as secrets.