JWT Debugger
Decode and inspect JWT tokens locally in your browser. View header and payload with formatted JSON output.
Security Notice
JWTs are decoded locally in your browser. No data is sent to any server.
How to Use the JWT Debugger
JWT (JSON Web Token) is a compact, URL-safe token format used for securely transmitting information between parties. JWTs consist of three parts separated by dots: a header, a payload, and a signature. The header typically contains the token type and signing algorithm, while the payload contains claims (statements about an entity and additional data).
Our JWT debugger allows you to decode and inspect JWT tokens without sending any data to external servers. All processing happens locally in your browser, ensuring complete privacy and security. This is essential when debugging authentication issues, verifying token contents, or understanding the structure of JWTs used in your applications.
Simply paste your JWT token into the input field, and the tool will automatically decode and display the header and payload in formatted JSON. This makes it easy to inspect claims, expiration times, and other token metadata without writing custom code.