Decode and inspect JWT tokens instantly. View header, payload and expiration details directly in your browser — no data is sent to any server.
A JSON Web Token (JWT) is a compact, URL-safe format for transmitting claims between two parties. JWTs are widely used for authentication and authorization in web applications and APIs.
Every JWT has three parts separated by dots: the header (algorithm and token type), the payload (claims like user ID, expiration and permissions) and the signature (used to verify the token has not been tampered with).
Input:
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c
Decoded payload:
{ "sub": "1234567890", "name": "John Doe", "iat": 1516239022 }