Password Strength Checker
Test the security of your password and learn how long it would take to crack.
Password Strength
Enter password
Time to Crack
Offline Fast Attack:
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Online Throttled Attack:
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Feedback & Tips
- Use a longer password.
- Mix uppercase, lowercase, numbers, and symbols.
100% Secure & Private: This tool runs entirely in your web browser. Your password is
never sent over the network, saved, or logged anywhere.
How Do We Measure Password Strength?
We use the industry-standard `zxcvbn` library algorithm originally developed by Dropbox. Rather than just enforcing simple rules (like requiring one uppercase letter), this algorithm realistically estimates how many guesses an attacker would need to crack your password by comparing it against extensive dictionaries of common passwords, names, slang, and known patterns.