Decode and analyze JSON Web Tokens (JWT) instantly. View header, payload, and signature information.
Enter a JWT token on the left and click "Decode Token" to see the results
JSON Web Tokens (JWT) are an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.
Contains metadata about the token like algorithm and token type
Contains the claims (user data and other information)
Cryptographic signature to verify the token integrity
Security Note: Never decode JWT tokens that contain sensitive information in untrusted environments. This tool runs entirely in your browser and does not send any data to external servers.
A JSON Web Token (JWT) is a compact token used for authentication and authorization. It contains a header, payload (claims), and a signature.
This tool decodes JWTs in your browser and does not need your secret key. Avoid pasting production tokens with sensitive data into untrusted environments.
The signature is not “decoded” into readable data. It is used to verify integrity and authenticity when you validate the token using the correct secret or public key.