HMAC Generator
Generate HMAC-SHA256 or HMAC-SHA1 digests with a secret key using Web Crypto. Nothing leaves your browser.
Example
Message hello with key secret and HMAC-SHA256 produces a 64-character hex digest.
FAQ
Prefer HMAC-SHA256 for new work. SHA-1 is offered for compatibility with older systems.
This tool outputs a lowercase hexadecimal digest.
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