HMAC Calculator
Hash-based Message Authentication Code (HMAC) is a specific type of message authentication code involving a cryptographic hash function and a secret key.
Message Content
Enter message text to calculate HMAC
Secret Key
tools.hmac-calculator.keyDescription
Algorithm Settings
Select HMAC algorithm and output format
File Input
Select file to calculate HMAC value
Drag file here or click to select
Calculation Result
HMAC-SHA256 (256-bit) - Recommended HMAC algorithm
No HMAC result yet
HMAC Information
SHA256
HMAC based on SHA-256, currently the most recommended choice
Output Length
256 bits (64 hex)
Recommended Key Length
≥ 256 bits
tools.hmac-calculator.usageInstructions
- Enter message and key, system automatically calculates HMAC value
- Supports multiple key formats: plain text, hexadecimal, Base64
- Supports HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, HMAC-SHA512
- Can verify HMAC value correctness to ensure data integrity
Calculation History
Recent HMAC calculations
No calculation history