HMAC Generator

Generate HMAC signatures using MD5, SHA-1, SHA-256, SHA-384, or SHA-512 with a secret key. For API authentication and data integrity.

Cryptography
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AlgorithmHMACBits
Enter message and key to generate

Common use cases

Frequently asked questions

What's the difference between HMAC and a regular hash?

HMAC combines a hash function with a secret key. Without the key, an attacker cannot generate a valid HMAC, which makes it suitable for authentication. A regular hash has no key and proves only integrity, not authenticity.

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