What is a Decode JWT Token Tool?

A Decode JWT Token Tool is a free online tool with which you can decode and see the contents of a JWT (JSON Web Token) without the need for a secret key. JWTs are generally used for securely passing data between parties, such as web authentication and API authorizations.

The tool retrieves and displays the header, payload, and signature of a JWT so developers and security teams can quickly debug and analyze tokens.

How to Use the Decode JWT Token Tool

Decoding a JWT is simple and rapid:

• Place your JWT token in the box above.
• Click the 'Decode' button.
• See the decoded Header and Payload in human-readable JSON format immediately.
• Verify claims like iss, exp, sub, aud, and custom claims

No authentication or secret key is required—this tool just performs safe, read-only token decoding.

Why Use a JWT Decoder?

• Check JWT Structure

  Break your JWT into three components—Header, Payload, and Signature—to see how it's assembled.

• Debug Authentication Problems

  Good for testing if the token is valid, has expired, or lacks key claims when creating an API.

• Secure & Safe Decoding

  This does not authenticate or check signatures but just decodes and displays what's within your token.

• Ideal for Developers, Admins & Security Teams

  Use it while developing, testing, or debugging identity and access flows.

• Handles Standard and Custom Claims

  Decode any JWT and inspect standard fields (iat, nbf, exp) and custom information.

Try It Now!

Copy the JWT token above and click 'Decode' to instantly see what's inside it. Take a look inside your tokens and debug auth like a pro with our Decode JWT Token tool!