HMAC Generator
Generate key-based HMAC (Hash-based Message Authentication Code) values for messages.
HMAC Generator & Authenticator
Generate secure Hash-based Message Authentication Codes (HMAC) using SHA-1, SHA-256, SHA-384, and SHA-512 algorithms for API authentication and data integrity verification.
Multiple Algorithms
Support for SHA-1, SHA-256, SHA-384, and SHA-512 hash algorithms with simultaneous generation.
Secure Authentication
Generate cryptographically secure authentication codes for API security and message verification.
Browser-Based Crypto
Uses native Web Crypto API for secure, client-side HMAC generation without server dependencies.
Security Applications
- API Authentication
Verify request integrity and authenticate API calls with secure HMAC signatures
- Webhook Verification
Ensure webhook requests come from trusted sources using HMAC validation
- JWT Token Signing
Secure JSON Web Tokens with HMAC-based digital signatures
- Data Integrity Verification
Detect unauthorized modifications to stored or transmitted data
Algorithm Comparison
Legacy systems only - not recommended for new implementations
Recommended for most applications - excellent security and performance balance
High security requirements - government and enterprise applications
Maximum security - cryptographic applications and sensitive data
🔐 HMAC Security Best Practices
• Use SHA-256 or stronger algorithms
Avoid SHA-1 for new implementations
• Generate high-entropy secret keys
Use cryptographically secure random generators
• Never hardcode secret keys
Store keys securely using environment variables
• Implement key rotation policies
Regularly update keys for enhanced security