Password Strength Checker & Generator — Test How Long to Crack Your Password
Common questions
How does the password strength checker work?
This password checker uses the zxcvbn library — the same tool used by Bitwarden — to analyse patterns, common words, keyboard sequences, and brute-force estimates. It gives a far more realistic result than simple entropy calculators.
How do I generate a strong password?
Click “Generate strong password” to instantly create a random 16–20 character password using uppercase, lowercase, numbers, and symbols. Strong passwords should be at least 12 characters and avoid dictionary words or personal information.
Is it safe to type my real password here?
Yes. All analysis happens locally in your browser using JavaScript. Your password is never sent to any server, stored, or logged. You can verify this by turning off your internet connection and testing it.
How long does it take to crack a password?
It depends on length and complexity. A short 6-character password can be cracked in seconds. A random 16-character password mixing symbols, numbers, and letters could take centuries even with fast offline hardware.