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JWT Decoder

Decode and inspect JSON Web Tokens (JWT) securely in your browser.

What is JWT Decoder?

JSON Web Tokens (JWT) have become a standard for securely transmitting information between parties. The JWT Decoder is a free online tool that allows developers to decode and inspect JSON Web Tokens securely in their browser. This tool is useful for developers who need to verify the contents of a JWT, such as the payload, header, and signature. By using the JWT Decoder, developers can ensure that their JWTs are properly formatted and contain the expected information, helping to prevent errors and security vulnerabilities in their applications.

Encoded Token
Header Algorithm & Token Type
Payload Data & Claims
Verify Signature (Optional)

Enter the secret used to sign the JWT below:

Frequently Asked Questions

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 token is digitally signed and contains a payload that can be verified and trusted.
Is it safe to decode JWTs online?
Yes, our JWT Decoder tool is designed to be used securely in your browser. The tool does not send your JWT to our servers, so you can decode and inspect your tokens without worrying about exposing sensitive information.
What information can I expect to see when I decode a JWT?
When you decode a JWT using our tool, you can expect to see the header, payload, and signature. The header typically contains the algorithm used to sign the token, while the payload contains the claims or data that the token is asserting. The signature is used to verify the authenticity of the token.

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How to use the JWT Decoder

To use the JWT Decoder, simply follow these steps:

  • Paste your JSON Web Token into the input field.
  • Click the "Decode" button to decode the token.
  • Inspect the decoded token, which will be displayed in a human-readable format.

You can then use this information to verify the contents of the token and ensure that it is properly formatted and contains the expected information.