Password Strength Analyzer

We use the industry-standard `zxcvbn` library, originally developed by Dropbox. It recognizes patterns, common names, dates, keyboard layouts, and popular dictionary words to provide a realistic estimation of how hard a password is to crack.

Absolutely not. The password analysis runs entirely locally on your device via JavaScript. Nothing is ever sent over the network.

The crack time is an estimate of how long it would take a hacker using dedicated, high-speed offline hardware to guess your password using brute-force and dictionary attacks.

If your password contains common words (like 'password', 'admin', or your name), keyboard patterns (like 'qwerty'), or dates, attackers will try those first. Modern cracking tools easily bypass simple character replacements like 'P@ssw0rd'.

A dictionary attack is a method where an attacker tries millions of common words, names, and leaked passwords to guess your password. Our tool checks if your password is vulnerable to this.

The easiest way to improve your score is to increase the length of the password and avoid common words. Using a 'passphrase' consisting of 3 or 4 random, unrelated words is highly effective.

We provide automatically generated, stronger alternatives based on your input. This includes breaking predictable patterns, substituting characters safely, or generating a memorable passphrase.

No password is truly unhackable, but a 100% score indicates that it would take centuries for current hardware to crack it, making it exceptionally secure.

Yes, many reputable password managers use similar algorithms (like zxcvbn) to measure password entropy and warn users about weak passwords.

Every additional character exponentially increases the number of possible combinations. A long password of simple letters is often much harder for a computer to guess than a short password packed with symbols.