Secret Key
Algorithm
Message
HMAC (Hex)
Waiting for key and message...
HMAC (Base64)
Waiting for key and message...
Output will appear here
Secret Key
Algorithm
Message
HMAC (Hex)
Waiting for key and message...
HMAC (Base64)
Waiting for key and message...
Output will appear here
HMAC Generator
Securely generate Hash-based Message Authentication Codes (HMAC) entirely in your browser using the native Web Crypto API. Supports SHA-256, SHA-384, and SHA-512 algorithms.
Use Cases
- Verifying API webhook signatures
- Generating secure tokens for authentication
Frequently Asked Questions
Is my input sent to a server?
No. All HMAC calculations are performed locally in your browser using the Web Crypto API.