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HMAC Generator
Calculate an HMAC using SHA-256, SHA-384, or SHA-512 from a message and key.
How it works
Enter a message and a key, select an algorithm, and generate a hexadecimal HMAC signature using Web Crypto.
Frequently asked questions
What's the difference between hash and HMAC?
HMAC incorporates a secret key in addition to the message.
Does the key leave the browser?
No. The operation is carried out locally.