HMAC Generator
Generate HMAC signatures using SHA-256, SHA-384, or SHA-512 — entirely in your browser.
About HMAC
HMAC (Hash-based Message Authentication Code) is a mechanism for verifying both the integrity and authenticity of a message using a cryptographic hash function and a secret key. It is commonly used in API authentication (e.g. AWS Signature, JWT verification) and data integrity checks. This tool uses the browser's native Web Crypto API — your data never leaves your device.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is HMAC Generator really free?
Yes. HMAC Generator is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does HMAC Generator upload my data?
No. HMAC Generator runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and HMAC Generator is ready to use on desktop or mobile.
Does HMAC Generator work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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