JWT Decoder

Decode and inspect JSON Web Tokens — securely in your browser.

100% Browser-Based

Files Never Leave Your Device

No Server Uploads

Zero Data Collection

How It Works

Paste your JWT token into the input field

The token is automatically decoded as you paste

View header, payload, signature, and expiration status

Header, payload, and signature displayed with distinct colors

Instantly see if the token is expired with visual indicators

Human-readable dates for iat, exp, and nbf claims

Tokens never leave your browser — all decoding happens client-side

Is it safe to paste my JWT here?

Yes. All decoding happens locally in your browser. Your token is never sent to any server.

Does this verify the signature?

This tool decodes and inspects the token structure. Signature verification requires the secret key, which is not handled here for security reasons.