HMAC Generator
Generate HMAC signatures instantly. Support for HMAC-SHA256, SHA-512, and more.
💡 About HMAC
- HMAC: Hash-based Message Authentication Code
- Used to verify both data integrity and authenticity
- Common in API authentication (e.g., AWS, webhooks)
- Both sender and receiver must have the same secret key
- Stronger than simple hashing - includes secret key
How to Generate HMAC
- Enter your message or data to sign
- Provide your secret key
- Select the HMAC algorithm (HMAC-SHA256, etc.)
- Choose output format (hex, base64)
- Click "Generate HMAC" to create the signature
- Use the generated signature for API authentication
What is HMAC?
🔐 HMAC Definition
HMAC (Hash-based Message Authentication Code) is a cryptographic hash function that combines a message with a secret key. It's used for authentication and integrity verification.
💡 Key Advantages
- ✓ Detects message tampering
- ✓ Verifies message authenticity
- ✓ Fast computation
- ✓ Works with any hash algorithm