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JWT Decoder

Paste a JSON Web Token to decode its header and payload. Runs entirely locally, so sensitive tokens never leave your browser.

Paste your JWT token

Header

Payload

How to use the JWT Decoder

Paste a JSON Web Token (JWT) to decode and inspect its header and payload. Decoding runs entirely locally, so sensitive tokens never leave your browser.

Steps

  • Paste the token — a standard JWT has three dot-separated segments: header.payload.signature.
  • Click Decode to view the formatted header and payload JSON side by side.

Note: the signature is not verified — this tool only decodes and pretty-prints the header and payload. It also does not reveal the token's secret.