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JWT Decoder

Decode JWT header and payload for inspection. Signatures are not verified — use for debugging only.

Private by design. Runs in your browser. We don’t store what you paste.

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How it works

  1. 1Paste a JWT.
  2. 2Inspect header and payload JSON.
  3. 3Remember: no signature verification.

FAQ

Do you verify signatures?
No. This tool only base64url-decodes parts for viewing.