HMAC Generator
Generate HMAC signatures using various hash algorithms.
How to Use HMAC Generator
- Enter the text you want to encrypt or hash
- Select the algorithm and provide any required keys
- View the encrypted or hashed output
- Copy the result for use in your application
Why Use HMAC Generator?
Cryptographic tools on FreeTools.one implement industry-standard algorithms — AES-256, SHA-256, HMAC, and more — entirely in your browser. Your plaintext, keys, and encrypted output never leave your device. This is critical: online encryption tools that process data on remote servers cannot guarantee the security of your sensitive information. Our tools use the Web Crypto API for hardware-accelerated performance, supporting both encryption and decryption in the same interface. Whether you're generating hashes for password storage, creating HMAC signatures for API authentication, or encrypting sensitive data, these tools provide the security guarantees you need.
- Industry-standard cryptographic algorithms
- All encryption happens in your browser — keys never leave your device
- Support for multiple algorithms and key sizes
- Essential for developers building secure applications
Frequently Asked Questions
Are my encryption keys secure?
Yes. All cryptographic operations happen in your browser. Keys and data never leave your device.
Which algorithms are supported?
The tool supports industry-standard algorithms including AES, SHA-256, HMAC, and more.
Can I decrypt data encrypted here?
Yes. Use the same tool with the decrypt option and your original key to reverse the encryption.