JWT Encoder
Create a signed HS256 JSON Web Token from a payload and secret.
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How it works
The JWT Encoder builds a complete HS256-signed JSON Web Token from your JSON payload and a secret key, computing the signature entirely in your browser — the secret never leaves your device.
Frequently asked questions
Is my secret sent anywhere?
No. The HMAC-SHA256 signature is computed entirely client-side in your browser; nothing is sent to a server.