HMAC Calculator
Message
Secret Key
Generated HMACs
HMAC generator helps you generate Hash-based Message Authentication Codes using a secret key and hash algorithm. This free online tool is ideal for developers who need to create HMAC signatures for API authentication and request validation. Enter your message and secret key, and the generator will produce the HMAC hash instantly.
HMAC (Hash-based Message Authentication Code) is a cryptographic method used to verify data integrity and authenticity using a secret key.
This HMAC generator allows you to generate cryptographic
signatures using popular algorithms such as HMAC-SHA256, HMAC-SHA1, and
HMAC-SHA512. HMAC combines a secret key with a hash function to ensure
data integrity and authenticity.
HMAC is widely used in APIs, webhooks, and secure communications to
verify that a message has not been tampered with. This tool provides
a quick and reliable way to generate HMAC values without writing
code.
The generator supports multiple HMAC algorithms and output formats
All hashing runs entirely in your browser for fast performance and
improved privacy. No message or secret key data is uploaded or
stored.