About KeyGuard Pro

KeyGuard Pro is a free password generator and strength checker. You choose a length and the kinds of characters you want, and the tool creates a random password in your browser. You can also type an existing password into the checker to see an estimate of its entropy, a measure of how many guesses an attacker would need.

Why it runs in your browser

A password tool is only useful if you can trust it, so KeyGuard Pro is built so that passwords are generated and analyzed on your own device, using your browser's built-in cryptographic random number generator. The passwords you generate or test are not sent to our servers or saved by us. The one exception is the optional Breach Check page, which sends only the first five characters of a one-way hash to the Have I Been Pwned service, as explained on that page. Details on the third-party services the site does load, such as analytics and advertising, are in the Privacy Policy.

How the strength estimate works

For random passwords, entropy equals the password length times log base 2 of the size of the character set in use. The checker applies this idea to what you type and treats it as an upper bound: a password that looks long but contains a common word or a keyboard pattern is much easier to guess than its length suggests, so treat the score as a guide rather than a guarantee.

How the site is funded

KeyGuard Pro is free to use. It is supported by advertising served through Google AdSense. Ads never affect the passwords the tool generates.

Who runs it

KeyGuard Pro is an independent project. If you find a bug, have a suggestion or spot something wrong in our guidance, please write to us through the Contact page.

Last updated: November 2026