Password Strength Checker
Type your password below to check its strength. Everything runs locally in your browser. Nothing is stored or transmitted.
Entropy: 0 bits
Very Weak
Estimated crack time: Instantly
How password strength is calculated
Password strength is based on entropy — the measure of randomness. Longer passwords with mixed uppercase letters, lowercase letters, numbers, and symbols provide higher entropy and stronger resistance against brute-force attacks.
How strong should a password be?
Security experts recommend at least 12–16 characters. For critical accounts, 20+ characters with mixed character types is ideal.