Password Strength Meter
Find out exactly how long it takes a hacker to crack your password. Our algorithm detects dictionary words, predictable patterns, and names.
Security Analysis
🔐 About Password Strength Meter
Traditional password meters only check if you included a capital letter or symbol. Our tool uses Dropbox's open-source zxcvbn algorithm. It analyzes thousands of common dictionary words, leaked passwords, and predictable keyboard patterns (like "qwerty") to give you a realistic cracking time based on a hacker capable of 10 billion guesses per second.
Password Security FAQ
No. Zero data leaves your browser. The entire algorithm runs locally via JavaScript. Your input is never logged, stored, or transmitted over the internet.
It estimates how long it would take a hacker using dedicated, high-speed hardware (capable of guessing billions of times per second) to force-guess your password.
If you used a dictionary word (like "Monkey123"), the algorithm detects it instantly. Hackers don't guess randomly; they use automated dictionaries of common words.
Developed by Dropbox, zxcvbn is an open-source password strength estimator. It recognizes patterns like dates, names, common substitutions (e.g., '@' for 'a'), and keyboard walks.
Not always! A very long passphrase consisting of four random words (e.g., "horse-battery-staple-correct") is often vastly stronger than a short password packed with symbols.
Hackers use open-source lists of the most common first and last names in the world. If your password relies on a name, it will be cracked in milliseconds.
No. These are called predictable substitutions (l33t speak). Cracking software is specifically programmed to automatically test these substitutions immediately.
Entropy is a measure of unpredictability. A higher entropy means there are more possible combinations, exponentially increasing the time it takes to crack it.
If you are creating a master password for a password manager or your primary email, aim for a cracking time of "Centuries" or higher for total peace of mind.
Absolutely. You should only have to remember one incredibly strong master passphrase. Use a password manager to generate and store random strings for every other website.