security

JWT Decoder

Decode JWT header & payload (Base64URL). Decode only — signature is never treated as verified.

How to use

  1. Paste a JWT (optionally with Bearer prefix).
  2. Inspect header claims and payload JSON.
  3. Remember: this does not prove the token is authentic.

FAQ

Do you verify signatures?

No. Verification would require secrets/keys and could be misread as a trust oracle. This tool only decodes.

Stored?

Never — processed in memory for the request.