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JWT Decoder
Instantly view the header and payload of a JWT without sending tokens to a server.
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Your privacy matters
All files are processed locally in your browser. Nothing is uploaded to our servers, so your documents remain private and secure.
Common use cases
- Debugging authentication headers in web applications
- Checking token expiration (`exp`) or issued-at (`iat`) dates
- Verifying the scopes and claims granted to a specific user session
- Preparing utilities files before sending them to a client or teammate
- Cleaning up one-off utilities tasks without installing desktop software
- Working with private material without routing it through a third-party upload queue
Why JWT Decoder?
Many developers paste sensitive production JWTs into random online decoders, unwittingly exposing user data or active session tokens to third-party logs. Our JWT decoder runs 100% client-side, ensuring your tokens cannot be intercepted.
JWT Decoder keeps the job narrow: instantly view the header and payload of a jwt without sending tokens to a server. It is built for the small but frequent moments when opening a heavyweight editor, installing a package, or uploading sensitive work to a random service is more friction than the task deserves.