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JWT Decoder

Paste a JSON Web Token to instantly decode and inspect its header, payload, and signature. No verification — for inspection only.

JWT Decoder

Paste a JSON Web Token (JWT) to decode its header and payload. This does not verify signatures.

JWT inputheader.payload.signature
Decoded JWT
Header
Payload
Signature

How to use

  1. Paste your JWT token (the full eyJ… string) into the input.
  2. The header and payload are decoded and displayed as formatted JSON.
  3. The signature section is shown separately — note this tool does not verify signatures.

Everything runs in your browser — no data is sent to any server.