ConvertUtility

JWT Decoder Online

Free online JWT decoder. Decode header and payload locally in your browser. This tool does not verify signatures.

How to use

  1. Paste your JWT token into the input field.
  2. The tool decodes header and payload instantly.
  3. Copy the decoded JSON for debugging.

FAQ

Does this tool verify the JWT signature?

No. It only decodes the token; signature verification is not performed.

Is my token uploaded?

No, decoding runs locally in your browser.

Why does decoding fail?

The token may be malformed or not valid Base64URL / JSON.