Generate HMAC signatures using SHA-256, SHA-384, or SHA-512 — entirely in your browser.
HMAC (Hash-based Message Authentication Code) is a mechanism for verifying both the integrity and authenticity of a message using a cryptographic hash function and a secret key. It is commonly used in API authentication (e.g. AWS Signature, JWT verification) and data integrity checks. This tool uses the browser's native Web Crypto API — your data never leaves your device.
Yes, HMAC Generator is completely free to use on UtilityCove.
No. HMAC Generator runs in your browser, so your input stays on your device.
Yes. HMAC Generator works on modern mobile and desktop browsers.
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