Password Strength Checker
Interactive Analysis
VERY WEAKseconds–minutes
WEAKhours–weeks
GOODmonths–years
STRONGcenturies
Estimated Time to Crack
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offline slow-hashing (bcrypt/scrypt)
Strength Class
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offline slow-hashing (bcrypt/scrypt)
Uppercase (A–Z)
Lowercase (a–z)
Numbers (0–9)
Special (!@#$…)
8+ characters
16+ characters
💡 Tips to Improve
Detailed Analysis
Overall Strength
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Enter a password to analyze
We'll show detailed analysis of your password strength and security metrics.
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Realistic Estimation
We use the zxcvbn library developed by Dropbox, which analyzes real-world attack patterns, dictionary words, and common substitutions — not just character counts.
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100% Private
Everything happens in your browser. Your passwords are never transmitted, stored, or logged. Zero server contact for password data.
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Instant Analysis
Real-time strength feedback as you type. Covers offline dictionary attacks, brute-force scenarios, and pattern recognition simultaneously.