About JSON Web Tokens (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. This information can be verified and trusted because it is digitally signed.
Decoding the Structure
A JWT typically consists of three parts separated by dots: Header, Payload, and Signature. Our JWT decoder allows you to inspect the algorithm and token type in the header, and the claims (such as user ID or permissions) within the payload, without needing a secret key.
Secure Inspection
Debugging authentication issues often requires viewing the contents of an auth token. This tool performs all decoding locally in your browser. Your tokens are never sent to a server, providing a private and secure way to inspect JWTs during development and troubleshooting.