HMAC Generator
Generate Hash-based Message Authentication Codes (HMAC) with support for multiple algorithms. Perfect for API authentication, message integrity verification, and secure token generation.
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HMAC Signature Generator
Features
A comprehensive tool for generating and working with HMAC signatures.
Multiple Algorithms
Support for SHA, MD5, RIPEMD, DES, and other HMAC algorithms
Secure Generation
Uses Web Crypto API for cryptographic operations
Format Options
Output in hexadecimal or base64 encoding
Developer Friendly
Clear interface with instant feedback
Easy Export
One-click copy of generated signatures
Educational Resource
Learn about HMAC implementation best practices
Input Validation
Real-time validation of inputs and parameters
Key Management
Secure handling of cryptographic keys
How to Use
Simple 4-step process
Step 1
Select your preferred HMAC algorithm from the dropdown
Step 2
Enter your message and secret key in the respective fields
Step 3
Choose hex or base64 output format
Step 4
Generate and verify your HMAC signature
Frequently Asked Questions about HMAC
Everything you need to know about our process, pricing, and technical capabilities.
See Full FAQHMAC (Hash-based Message Authentication Code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key. It provides a way to verify both the data integrity and authenticity of a message.
For most modern applications, HMAC-SHA256 or HMAC-SHA512 are recommended. SHA-256 provides excellent security for most use cases, while SHA-512 offers additional security margin. Avoid older algorithms like MD5 or SHA-1 for new applications.
HMAC keys should be: randomly generated, at least as long as the hash output, stored securely, rotated periodically, and never transmitted in plain text. Use secure key management systems in production environments.
HMAC is commonly used for: API authentication, message integrity verification, digital signatures, secure cookie validation, webhook verification, and secure token generation. It's a fundamental tool in cryptographic protocols.
No, browser support varies. The Web Crypto API typically supports common algorithms like SHA-256 and SHA-512, but specialized algorithms might require server-side implementation or external libraries.
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