Free HMAC Generator Online
Cryptography
What is Free HMAC Generator Online?
HMAC Generator computes Hash-based Message Authentication Codes (HMACs) using a secret key and a message. HMACs are a type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key. They are used to simultaneously verify both the data integrity and the authenticity of a message. This tool supports various SHA algorithms (SHA-256, SHA-384, SHA-512) and outputs the result in Base64 format.
How it works
The tool takes a secret key and a message as input. It then applies a chosen cryptographic hash function (e.g., SHA-256) in conjunction with the secret key to generate the HMAC. This process is executed entirely within your browser using the Web Crypto API, ensuring the confidentiality of your secret key and message. The resulting HMAC is encoded in Base64 for ease of use in web protocols.
Features & Benefits
- Runs entirely in your browser - no server involvement
- Supports HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512
- Output as base64 for easy API use
Frequently Asked Questions
What is HMAC?
HMAC (Hash-based Message Authentication Code) is used to verify message integrity and authenticity.
When should I use HMAC?
HMAC is commonly used for signing API requests and webhook payloads.
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