JWT Decoder & Validator
Decode and validate JSON Web Tokens (JWT) online
Securely decode JWT tokens, validate signatures with HMAC algorithms, and inspect claims. All processing happens in your browser - your tokens are never sent to any server.
JSON Web Token
JWT (JSON Web Token) is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. It is commonly used for authentication and information exchange in web applications.
JWT Structure
A JWT consists of three parts separated by dots: Header (algorithm and token type), Payload (claims and data), and Signature (verification of authenticity). The format is: xxxxx.yyyyy.zzzzz
Common Use Cases
JWTs are widely used for user authentication, API authorization, single sign-on (SSO), and secure information exchange between services. They are stateless and can be verified without querying a database.