🔐 What is an HMAC?
HMAC (Hash-based Message Authentication Code) is a type of message authentication code that uses a cryptographic hash function and a secret key. It's widely used to verify data integrity and authenticity, especially in APIs, secure tokens, and digital signatures.
⚙️ What This Tool Does
This free online HMAC Generator allows you to easily generate HMAC hashes using popular algorithms like:
- HMAC-SHA256
- HMAC-SHA1
- HMAC-SHA512
- HMAC-MD5
All computations are done entirely in your browser using CryptoJS. No data is sent to any server.
📘 Example
Message: HelloWorld
Secret Key: abc123
Algorithm: HMAC-SHA256
Output: fb802abfd23d2b82f15d65e7af32e2ad75...
🚀 Use Cases
- Generate secure signatures for API authentication (e.g., AWS, Stripe, etc.)
- Hash and verify tokens or payloads
- Educational or debugging purposes for developers
No installation, no login, 100% free & privacy-friendly.