Developer Tools
JWT Decoder
Decode JSON Web Tokens and inspect header and payload instantly.
Enter JWT Token
Results
Status
Ready
Token parts
0
Header length
0
Payload length
0
Error
-
Token Result
Waiting for token
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.
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.
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.