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Paste a JSON Web Token to instantly decode and inspect its header, payload, and registered claims.
A client-side JWT decoder that splits any JSON Web Token into its three parts — header, payload, and signature — and displays them as formatted JSON. Automatically detects registered claims (iss, sub, aud, exp, nbf, iat, jti), converts Unix timestamps to human-readable dates, and shows an expiration status badge. Features one-click copy for each section, paste-from-clipboard, and Ctrl+Enter to decode. Runs entirely in the browser with zero dependencies — your tokens never leave your machine.
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JWT Decoder is a free online tool available on BuildHub. Paste a JSON Web Token to instantly decode and inspect its header, payload, and registered claims.
This tool is designed for developers, engineers, and technical professionals who want to speed up their daily coding tasks. It runs entirely in your browser — no downloads, no sign-ups, and no data sent to external servers.
Whether you're working on a quick personal project or a professional deliverable, JWT Decoder helps you get results faster with zero friction.
Yes, 100% free with no hidden costs. You don't need to create an account or provide payment information. Just open the tool and start using it.
Absolutely. JWT Decoder processes everything directly in your browser. Your input data is never uploaded to our servers or stored anywhere.
Yes. The tool is fully responsive and works on smartphones, tablets, and desktop browsers. No app installation required.