QuickToolz HMAC Generator is a free online tool. No sign-up needed.
How to Use HMAC Generator
Step 1
Enter the message and secret key
Step 2
Choose the hash algorithm
Step 3
Copy the HMAC signature
What is HMAC Generator?
The QuickToolz HMAC Generator computes HMAC signatures using SHA-256, SHA-384, and SHA-512. Useful for verifying webhook payloads, generating API request signatures, and message authentication.
Frequently Asked Questions
What is an HMAC?
HMAC (Hash-based Message Authentication Code) proves that a message has not been tampered with and was created by someone with the secret key.
What algorithm should I use?
HMAC-SHA256 is the most widely used and is required by many APIs including AWS Signature v4.
Can I verify an existing HMAC?
Yes, enter the message, key, and expected HMAC to verify whether it matches.
More Free Security Tools
- Password Generator – Generate strong, cryptographically secure passwords
- UUID Generator – Generate UUID v1, v4, and v5 identifiers in bulk
- Password Strength Checker – Check password strength with detailed feedback
- Hash Calculator – Compute SHA-256, SHA-512, SHA-1 and MD5 hashes
- CSP Generator – Build Content Security Policy headers visually
- Secure Token Generator – Generate cryptographically secure API keys and tokens
- Base64 Encode/Decode – Encode and decode text and files with Base64
All 130+ QuickToolz tools work in your browser – no install, no account, no cost.