JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View the header, payload, and claims without verifying the signature.
Frequently Asked Questions
What is a JWT?
JWT (JSON Web Token) is a compact, URL-safe means of representing claims between two parties. It consists of three Base64URL-encoded parts: header, payload, and signature, separated by dots.
Is it safe to paste my JWT here?
Yes! All decoding happens entirely in your browser. Nothing is sent to any server. However, be cautious with production tokens — anyone with a valid JWT can use it until it expires.
Does this tool verify the signature?
No, this tool only decodes and displays the JWT contents. Signature verification requires the secret key or public key, which should never be shared in a browser tool.