JWT Decoder

Decode JSON Web Tokens instantly. View header, payload, and expiration status. Free, no upload — runs in your browser.

JWT Decoder

Paste a JSON Web Token to decode and inspect its header, payload, and expiration status. No signature verification — your secret stays safe.

Frequently Asked Questions

What is a JWT?+
A JSON Web Token (JWT) is a compact, URL-safe means of representing claims between two parties. It consists of three parts: header, payload, and signature, separated by dots.
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 entered in a web tool.
Is my token uploaded to a server?+
No. All decoding happens in your browser. Your JWT never leaves your device.

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JWT Decoder — free online jwt decoder, jwt decode, jwt token decoder, decode jwt online, jwt parser, json web token decoder, jwt debugger, jwt viewer. No signup required. Works in your browser.