Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.
HMAC Generator
Generate HMAC digests using SHA-256, SHA-512, or MD5.
FreeRuns in browserhmac generatorhmac sha256
Cmd/Ctrl+Enter Primary actionCmd/Ctrl+Shift+L Load sampleCmd/Ctrl+Shift+X Clear/resetCmd/Ctrl+Shift+C Copy result
About HMAC Generator
Generate HMAC digests using SHA-256, SHA-512, or MD5. Generate HMAC message authentication codes online for free. Supports HMAC-SHA256, HMAC-SHA512, HMAC-SHA1, and HMAC-MD5 with match verification. Supports multiple industry-standard hash algorithms with instant computation. Includes a match-checking feature to verify data integrity by comparing hash values. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.
Related tools: Bcrypt Hash Generator & Checker, Hash Comparator, JWT Token Generator
How to Use HMAC Generator
- Enter text or upload a file to hash.
- Select the hashing algorithm you want to use.
- View and copy the generated hash value.
Frequently Asked Questions
What is HMAC Generator?
Generate HMAC message authentication codes online for free. Supports HMAC-SHA256, HMAC-SHA512, HMAC-SHA1, and HMAC-MD5 with match verification.
Which hash algorithms are supported?
The tool supports a range of industry-standard hash algorithms including MD5, SHA-1, SHA-256, SHA-384, and SHA-512. You can select the algorithm from the dropdown and the hash is computed instantly.
Can I hash files?
Some hash tools support file input, allowing you to drag and drop or browse for a file to hash. The file is read locally in your browser and never uploaded, keeping your data completely private.
Are the hashes cryptographically secure?
SHA-256 and above are considered cryptographically secure for most purposes. MD5 and SHA-1 are provided for compatibility and checksum verification but should not be used for security-sensitive applications.
Is HMAC Generator free to use?
Yes, hashing is completely free with no limits on how many hashes you can generate. No registration is required.
Is my data safe when using HMAC Generator?
Yes, all hashing is performed locally in your browser. Your input text or file is never uploaded to any server.