HMAC Generator
Generate and verify HMAC signatures
HMAC Input
HMAC Signature
Enter message and secret key, then click Generate
Learn More
About HMAC
- •Hash-based Message Authentication Code for data integrity and authenticity
- •Combines cryptographic hash with secret key
- •HMAC-SHA256 is most common (256-bit output)
- •HMAC-SHA512 provides higher security (512-bit output)
HMAC in IAM
- •Webhook Verification – Validate incoming webhook payloads (Stripe, GitHub)
- •API Authentication – Sign API requests (AWS Signature V4)
- •JWT Signing – HS256/HS384/HS512 algorithms for symmetric signing
- •Session Tokens – Generate secure session identifiers