JWT Decoder
Decode JSON Web Tokens (JWT) effortlessly with our free JWT Decoder. Enter a JWT token and extract the header, payload, and signature instantly.
What is a JWT Decoder?
A JWT Decoder is a tool that extracts and displays the components of a JSON Web Token (JWT), including the header, payload, and signature. This helps developers analyze tokens and debug authentication flows.
Key Features of Our JWT Decoder
- Instant Decoding: Extract the header, payload, and signature instantly.
- Error Detection: Alerts for invalid or improperly formatted JWTs.
- Copy Functionality: Easily copy any decoded component to your clipboard.
- Secure and Private: All processing happens locally on your device.
Common Use Cases for a JWT Decoder
Our JWT Decoder is perfect for developers working with authentication and secure APIs. Here are some common use cases:
- Debugging: Analyze JWT structure during API development.
- Token Validation: Ensure the claims in the payload match your expectations.
- Education: Learn how JWTs work by visualizing their components.
- Troubleshooting: Decode tokens from production environments for debugging.
Frequently Asked Questions
A JWT (JSON Web Token) is a compact, URL-safe token used to represent claims between two parties securely.
Yes, decoding a JWT is secure because it only reads the publicly accessible parts of the token (header and payload) without verifying the signature.
The signature part of the JWT is encoded and cannot be decoded. It ensures the integrity and authenticity of the token.