HMAC Generator
Generate HMAC signatures for API authentication and webhooks
All generation happens in your browser. Your messages and secrets never leave your device and are not sent to any server.
Input
Algorithm Info
Recommended for most applications, good balance of security and performance
HMAC Signature
Common Use Cases
About HMAC
HMAC (Hash-based Message Authentication Code) is a cryptographic authentication technique that combines a secret key with a hash function to verify data integrity and authenticity.
Key features:
- Authentication: Verifies the sender and message integrity
- Tamper-proof: Any modification invalidates the signature
- Secret key: Only parties with the key can generate valid HMACs
- Fast: Efficient computation using hash functions
Use cases: API request signing, webhook verification, JWT signatures, session tokens, message authentication