Paste a JWT and decode its header and payload into readable JSON. This tool does not verify the signature.
A JWT (JSON Web Token) is a common format for passing verifiable claims between servers and clients, made of three dot-separated parts: header, payload, and signature. This tool decodes the first two parts into readable JSON — it does not verify the signature, since that requires the secret key used by the issuing server.
No. It only decodes the header and payload. Verifying the signature requires the secret key, which this tool never receives and doesn’t need.
No. Decoding happens entirely in your browser.
A JWT (JSON Web Token) is a common format for passing verifiable claims between servers and clients, made of three dot-separated parts: header, payload, and signature.