JWT (JSON Web Token) is a compact, URL-safe means of representing claims to be transferred between two parties. It's commonly used for authentication and information exchange.

How does the JWT debugger work?

Our JWT debugger decodes the three parts of a JWT token: header, payload, and signature. It displays the decoded information in a readable format for analysis and debugging.

Is my JWT token safe when debugging?

Yes! All JWT decoding happens 100% client-side in your browser. Your tokens never leave your device, ensuring complete privacy and security.

Can I verify JWT signatures?

Our tool decodes JWT tokens and displays signature information. For full signature verification, you would need the secret key, which we don't require for security reasons.

What JWT algorithms are supported?

Our debugger can decode JWTs using any algorithm (HS256, RS256, ES256, etc.). The algorithm is displayed in the header section of the decoded token.

🎫 JWT Debugger

Decode and verify JSON Web Tokens (JWT). View header, payload, and signature instantly.

📝 Encoded JWT

🔍 What is JWT?

JSON Web Token (JWT) is a compact, URL-safe means of representing claims between two parties. It consists of three parts: Header, Payload, and Signature.