Password Strength Checker
Instantly check how strong a password is, right in your browser - never sent anywhere.
Type a password below to instantly check its strength - entirely in your browser, your password is never sent anywhere, not even to us.
The score is calculated in your browser from the password's length (8, 12 and 16 or more characters each earn more points), its mix of lowercase letters, uppercase letters, numbers and symbols, and how varied its characters are. Points are deducted for runs of the same character, keyboard patterns such as qwerty or 12345, and passwords on a list of the most commonly used ones. Length matters most: a long passphrase of unrelated words is both stronger and easier to remember than a short, complicated password. JustChecker builds tools that respect your data - this one never leaves your browser.