JWT Decoder — View Header, Payload & Expiry in One Click

Paste a JWT and instantly see the decoded header, payload, claims, and expiration time. Debug auth issues in seconds. Your token never leaves your browser — 100% private, no server calls.

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Frequently Asked Questions

Is my token secure here?

Yes, all processing happens locally in your browser. Your token is never sent to any server.

Can it verify signatures?

We decode and display the token but don't verify signatures as that requires the secret key.

What JWT algorithms are supported?

We can decode any valid JWT regardless of the signing algorithm used.