Password Strength Checker
Test how strong and secure your password is. Get crack time estimate & improvement suggestions.
Strength Level
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Estimated Crack Time
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Issues & Suggestions
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How Strength Is Calculated
Uses zxcvbn library logic (entropy, common patterns, dictionary checks) to estimate real-world crack time.
- Weak: < 10^6 guesses (~instant)
- Medium: 10^6 – 10^10 (~hours to months)
- Strong: > 10^10 (~centuries+)
- Checks for length, variety, common passwords, keyboard patterns