Password Strength Checker
Interactive Analysis
VERY WEAK
seconds–minutes
WEAK
hours–weeks
GOOD
months–years
STRONG
centuries
Estimated Time to Crack
—
offline slow-hashing (bcrypt/scrypt)
Strength Class
—
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
🔐
Enter a password to analyze
We'll show detailed analysis of your password strength and security metrics.
Password Generator
Password Type
Password Length (8–128)
16
Include Characters
Generated Password
Click Generate to create a password
Strength
—
Estimated time to crack: —
Recent Passwords (session only)
No history yet
🔒 Passwords are generated locally in your browser. Nothing is sent to our servers.
🧠
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.
🔒
100% Private
Everything happens in your browser. Your passwords are never transmitted, stored, or logged. Zero server contact for password data.
⚡
Instant Analysis
Real-time strength feedback as you type. Covers offline dictionary attacks, brute-force scenarios, and pattern recognition simultaneously.