JWT Decoder & Debugger
Decode and analyze JSON Web Tokens (JWT) instantly. View header, payload, and signature information. Perfect for debugging authentication tokens and OAuth implementations: all processed securely in your browser.
Enter a JWT token to see the analysis
What is a JSON Web Token (JWT)?
A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. The claims in a JWT are encoded as a JSON object that is used as the payload of a JSON Web Signature (JWS) structure or as the plaintext of a JSON Web Encryption (JWE) structure, enabling the claims to be digitally signed or integrity protected with a Message Authentication Code (MAC) and/or encrypted.
How It Works
JWTs are typically used for authorization. Once a user is logged in, each subsequent request will include the JWT, allowing the user to access routes, services, and resources that are permitted with that token.
- Scalability: Tokens are stored on the client, not the server.
- Self-Contained: All necessary information is in the token.
- Mobile-Ready: Works perfectly with native mobile apps.