JWT Decoder
Decode JSON Web Tokens and inspect header and payload instantly.
Enter JWT Token
Results
About this tool
JWT Decoder lets you inspect JSON Web Tokens instantly by decoding the header and payload. It helps developers debug authentication tokens, inspect claims, and review token contents during API development. It is designed for quick development tasks such as debugging, formatting, validating, encoding, decoding, and inspecting data.
How to use JWT Decoder
- Paste your JWT token into the input box.
- Click Decode Token to decode the JWT.
- The tool will display the decoded header and payload.
- Review token claims such as exp, iat, and user information.
- Copy decoded data if needed.
Why use JWT Decoder?
JWT Decoder helps developers quickly inspect tokens used in authentication systems. It is useful when debugging APIs, verifying token structure, and checking payload information during development. This makes it useful when working with APIs, configuration files, logs, databases, web pages, or structured data.
Frequently Asked Questions
What does JWT Decoder do?
JWT Decoder reads a JSON Web Token and displays the decoded header and payload.
Does this tool verify the signature?
No. It only decodes the token contents but does not verify the signature.
Is my token sent to a server?
No. The decoding happens directly in your browser.
Is JWT Decoder free?
Yes. This tool is completely free to use online.
Do I need to install anything to use this tool?
No. You can use this tool directly in your browser without installing extra software.
Can I use this tool on mobile?
Yes. This tool can be used on desktop, tablet, and mobile browsers.