What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties. JWTs consist of three parts separated by dots: header, payload, and signature. They are commonly used for authentication and authorization in web applications.
How to Use This Decoder
Paste your JWT token into the textarea and click "Decode." The tool will parse the token and display the header (algorithm and token type), the payload (claims and data), and expiration status. Note: this decoder does not verify signatures, it only decodes the token contents.
Common JWT Claims
Standard claims include: iss (issuer), sub (subject), aud (audience), exp (expiration time), nbf (not before), iat (issued at), and jti (JWT ID). Custom claims can contain any application-specific data.