How to use JWT Decoder
- Paste your JWT (header.payload.signature) in the input area.
- The tool decodes and displays header, payload, and claims.
- Check expiration and signature details if shown.
Example
Input
Your input or data here
Output
Result will appear here after running the tool
Frequently asked questions
- Is my JWT sent to a server?
- Decoding can be done in the browser; check the tool's implementation. Never paste highly sensitive tokens on untrusted sites.
- What is a JWT?
- A JSON Web Token is a signed token (often used for auth) with a header, payload, and signature.
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