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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.

About OpenReplay
About this Tool

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

What is a JWT?

A JWT (JSON Web Token) is a compact, URL-safe token used to represent claims between two parties securely.

Is decoding a JWT secure?

Yes, decoding a JWT is secure because it only reads the publicly accessible parts of the token (header and payload) without verifying the signature.

Can I decode the JWT signature?

The signature part of the JWT is encoded and cannot be decoded. It ensures the integrity and authenticity of the token.