HMAC Generator
Generate HMAC (Hash-based Message Authentication Code) with SHA-256, SHA-512, and SHA-1 support. Client-side processing for maximum security.
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What is HMAC Generator?
An HMAC generator creates Hash-based Message Authentication Codes by combining a secret key with a message using algorithms like SHA-256. Verify data integrity and authenticate messages securely.
Key Benefits
- Multiple algorithms
- Secure hashing
- Easy verification
- Standard formats
Common Use Cases
- •API authentication
- •Webhook validation
- •JWT signing
- •Message integrity
How to Generate HMAC
- Enter message: Type the message to hash.
- Enter secret key: Provide the secret key.
- Select algorithm: Choose SHA-256, SHA-512, etc.
- Generate HMAC: View and copy the HMAC.
Key Features
- Generate HMAC signatures
- Multiple algorithms (SHA-256, SHA-512, MD5)
- Secret key input
- Hex and Base64 output formats
- Verify existing signatures
- API authentication helper
Frequently Asked Questions
What is HMAC?
HMAC (Hash-based Message Authentication Code) combines a secret key with a hash function to verify message integrity and authenticity.
Which algorithm should I use?
HMAC-SHA256 is widely recommended. SHA-512 for higher security. Avoid MD5 and SHA-1 for new implementations.
How do I verify an HMAC?
Generate HMAC with the same key and message, then compare with the received HMAC. Use timing-safe comparison.
What is HMAC used for?
API authentication, message signing, password storage verification, JWT signatures, and webhook validation.
Featured in Collections:Cryptography & Web Security Hardening