HMAC Generator
Generate and verify HMAC signatures for API security and message authentication
Select Algorithm
Choose the HMAC algorithm
Generate HMAC Signature
Create an HMAC signature for your message
0 characters
Keep this key secret and secure
Common Use Cases
Webhook Signatures: Verify webhook payloads from services
API Authentication: Sign API requests with shared secrets
Data Integrity: Ensure messages haven't been tampered with
Token Generation: Create secure tokens for authentication
Security Notes
Use SHA-256 or SHA-512 for production applications
Never expose your secret key in client-side code
Rotate secret keys regularly
All computation happens locally in your browser