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- HMAC Generator
HMAC Generator
Sign text with a shared secret using HMAC-SHA256. The calculation stays in your browser.
Hex
Base64
A signature, not a checksum
HMAC mixes the secret into the hash, so someone who can see the text still cannot produce the same signature without the secret. Both the secret and the text are read as UTF-8. This is SHA-256. It is the same construction used by many API signatures.