JWT Website

JWT.io is a web-based tool designed to decode, verify, and generate JSON Web Tokens (JWTs). It provides a user-friendly interface for developers and security professionals to interact with JWTs effectively.

https://jwt.io (opens in a new tab)

At JWT.io, users can paste a JWT token into the provided input field to instantly decode and analyze its contents. The tool displays the decoded header, payload, and signature, allowing users to inspect the claims and verify the token's integrity.

Additionally, JWT.io offers a built-in debugger that assists users in validating JWT signatures by providing the necessary cryptographic keys or secrets. This feature enables developers to verify the authenticity of JWT tokens before trusting them for authentication or authorization purposes.

Furthermore, JWT.io provides a JWT generator tool that allows users to create custom JWT tokens with specific claims and signatures. This feature is particularly useful for testing and prototyping JWT-based authentication systems.

Overall, JWT.io serves as a valuable resource for working with JSON Web Tokens, simplifying the process of decoding, verifying, and generating JWTs for secure authentication and authorization in web applications and APIs.