Instant feedback on how secure your password is — length, character variety and common patterns, analysed before you use it anywhere.
Password Strength Checker gives you instant feedback on how secure your password is before you use it anywhere. It analyzes length, character variety, and common patterns to estimate how resistant it is to brute-force and dictionary attacks, then shows you what to fix — like adding more characters or avoiding predictable sequences.
Entropy measures how unpredictable a password is. Higher entropy means an attacker needs exponentially more guesses to crack it. A good password has an entropy score above 70 bits and a minimum length of 12 characters.
Length — every extra character multiplies the number of possible combinations, dramatically increasing entropy.
Character variety — mixing uppercase, lowercase, numbers, and special characters expands the search space an attacker must cover.
Passwords with 70+ bits of entropy require an impractical amount of time to brute-force, even with modern hardware running billions of attempts per second.
🔒 Checks run privately — we never log, store or reuse what you type.