JWT Decoder

Decode JWT tokens. View header and payload as JSON.

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How it works

  1. 1Paste a JWT token (header.payload.signature format) into the input.
  2. 2The tool decodes the header (Base64URL) and displays it as JSON.
  3. 3The payload is decoded and shown as formatted JSON.
  4. 4Note: signature is not verified—use for inspection only.

Example

Input: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.dozjgNryP4J3jVmNHl0w5N_XgL0n3I9PlFUP0THsR8U
Output: Header: {"alg":"HS256"}, Payload: {"sub":"1234567890"}