Yes. JWT Decoder runs entirely in your browser. No data is uploaded or stored.

Does JWT Decoder work offline?

Yes. Once loaded, JWT Decoder works fully offline except for the QR code generator which uses a pinned CDN with SRI.

Local-only · nothing leaves your browser

How do I decode a JWT token?

Paste a JSON Web Token to instantly decode its header, payload, and signature. The tool shows expiry status, issued-at time, and all claims. Nothing is sent anywhere — everything runs locally in your browser.

Paste JWT token

Header

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Payload

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Signature (encoded)

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⚠ JavaScript is required for this tool — the page content above works without it.

F.A.Q. — Questions, answered

What is JWT Decoder?Paste a JSON Web Token to instantly decode its header, payload, and signature. The tool shows expiry status, issued-at time, and all claims. Nothing is sent anywhere — everything runs locally in your browser.
Is JWT Decoder free?Yes. JWT Decoder runs entirely in your browser. No data is uploaded or stored.
Does JWT Decoder work offline?Yes. Once loaded, JWT Decoder works fully offline except for the QR code generator which uses a pinned CDN with SRI.

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