HMAC Generator

HMAC-SHA-1/256/384/512 with secret key

Productivity

HMAC Generator

HMAC-SHA-1/256/384/512 with secret key

Secret key

Algorithm

Message

HMAC signature

About HMAC Generator

An HMAC (hash-based message authentication code) generator computes keyed-hashes for verifying message authenticity. Used by webhooks, API signatures (AWS, GitHub), and JWT-HS256 token signing.

Frequently asked questions

Hash: one input. HMAC: two inputs (message + secret key). HMAC proves you know the secret; a bare hash does not.

HMAC-SHA256 is the modern default. HMAC-SHA1 still acceptable for legacy systems; avoid HMAC-MD5.

Hex or base64; pick whichever your verifier expects.

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HMAC Generator

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