XTools
Loading...
🔐 HMAC Generator
Generate HMAC (Hash-based Message Authentication Code) for data integrity and authenticationPlain Text
HMAC Result
Secret Key
Hash Function
algorithms.SHA256
Output Encoding
encodings.Hex
Usage Guide
Enter Text
Enter the text you want to generate HMAC for
Configure Settings
Select hash algorithm and enter secret key
SHA256SHA512MD5SHA1
Generate & Copy
HMAC is generated automatically, copy the result
Features
🔐Support for 8 different hash algorithms (MD5, SHA1, SHA224, SHA256, SHA384, SHA512, SHA3, RIPEMD160)
⚡Multiple output encodings (Binary, Hexadecimal, Base64, Base64-URL)
🔍Real-time HMAC generation and updates
📊Secure cryptographic operations using crypto-js library
Technical Introduction
What is HMAC?
HMAC (Hash-based Message Authentication Code) is a mechanism for message authentication using cryptographic hash functions. It provides both data integrity and authentication by combining a secret key with the message.
Message Authentication: Verifies that the message came from the expected sender
Data Integrity: Ensures the message has not been tampered with
Key-based Security: Uses a shared secret key for authentication
Security Best Practices
Best practices for secure HMAC implementation
Use strong, random secret keys (at least 32 characters)
Use SHA-256 or SHA-512 for better security than MD5 or SHA-1
Never reuse HMAC keys across different applications or contexts
Important Notes
• All HMAC generation is performed locally in your browser• The same secret key must be used for both generation and verification• HMAC is resistant to length extension attacks unlike plain hash functions