HMAC-SHA512 Generator
Compute an HMAC-SHA512 of a message with your secret key.
—Hex
—Base64
● 🔒 Your data is processed locally in your browser with the Web Crypto API and is never uploaded to our servers.
How it works
HMAC-SHA512 produces a 512-bit signature (128 hex characters). It's used by JWT's HS512 algorithm and by several crypto-exchange APIs (Binance, Kraken) to sign requests. A key of at least 64 random bytes matches its strength.