JWT Decoder
Decode JWT header and payload for inspection. Decoding does not verify signatures.
Decoding a JWT does not verify its signature. Do not treat decoded contents as authenticated or trusted.
Your files are processed directly in your browser whenever possible.
How to use
- 1Open the JWT Decoder tool.
- 2Enter your input or upload a file if required.
- 3Review the result, then copy or download as needed.
How it works
This tool base64url-decodes the JWT header and payload for inspection only. It does not verify signatures or prove token authenticity.