HMAC Generator
Generate HMAC hashes using the Web Crypto API — SHA-256, SHA-1, or SHA-512.
🔒 No uploads⚡ Instant🆓 Free
How It Works
1
Enter your message and secret key.
2
Select the hash algorithm.
3
Copy the generated HMAC.
Features
✓SHA-256, SHA-1, and SHA-512 support
✓Uses native Web Crypto API
✓Hex and Base64 output formats
✓One-click copy to clipboard
✓No data leaves your browser
✓Uppercase/lowercase toggle
Frequently Asked Questions
What is HMAC?▼
HMAC (Hash-based Message Authentication Code) is a cryptographic authentication technique that uses a secret key combined with a hash function to verify both data integrity and authenticity.
Is the Web Crypto API secure?▼
Yes. The Web Crypto API is a W3C standard that provides native cryptographic operations in modern browsers.
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