Decode and inspect JSON Web Tokens. View header, payload, expiration, and claims.
A JSON Web Token (JWT) is a compact, URL-safe token used for securely transmitting information between parties. It consists of three parts: a header, a payload, and a signature, separated by dots. JWTs are widely used for authentication and authorization in web applications.
Yes. This tool decodes JWTs entirely in your browser using JavaScript. No data is sent to any server. However, you should never share production JWTs publicly, as they may contain sensitive claims.
This tool decodes and inspects JWTs but does not verify signatures, as that requires the secret key or public key used to sign the token.