Password Strength Checker
Analyze password entropy, estimated crack time, and weakness patterns — 100% client-side. Your password is never sent anywhere.
Private: Your password is never sent anywhere. All analysis runs in your browser.
Strong passwords use 12+ characters with uppercase, lowercase, numbers, and symbols.
Consider a passphrase: random words like "correct-horse-battery-staple" are strong and memorable.
Type a password to see its entropy, estimated crack time, and any weaknesses.