JWT Debugger
Decode and inspect JSON Web Tokens instantly. Processed locally for total privacy.
HEADER: ALGORITHM & TOKEN TYPE
// Header will appear here
PAYLOAD: DATA
// Payload will appear here
Understanding JWT
JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.
Structure of a JWT
A JWT is composed of three parts separated by dots: **Header**, **Payload**, and **Signature**. It looks like: `xxxxx.yyyyy.zzzzz`
- **Header**: Contains info about the algorithm and token type.
- **Payload**: Contains the claims (user data).
- **Signature**: Used to verify the message hasn't been changed along the way.