Cryptography
HMAC Calculator
Compute or verify HMAC-SHA-256/384/512 with a UTF-8 or Hex key. Runs entirely in your browser via Web Crypto.
Runs entirely in your browser; input is not sent to our servers.
Messages, keys, passwords, plaintext, ciphertext, and files are never stored in
localStorage, history, or analytics payloads.
Secure
HMAC (Hex)
HMAC (Base64)
Verify result
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