JWT Token Decoder

Decode any JWT — header, payload, expiry date and signature check, all processed locally in your browser.

JWT:

—Algorithm

—Expires

—Signature

—

—

Decoded locally — your token never leaves this browser.

How to use

Paste a JWT and instantly see its decoded header, payload and expiry time.

Is my token sent anywhere?

No — decoding happens entirely in your browser. Tokens never leave your device.

Does it verify the signature?

It shows whether a signature part exists, but verification needs your secret — decode only.

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Every tool runs 100% in your browser — no uploads, no signups. If a tool saved you time, consider supporting us with a small donation.