Password Strength Tester
Test your password strength and generate secure passwords with real-time analysis and recommendations.
Password Strength
Password Metrics
Crack Time Estimates
Issues & Recommendations
How it Works
This password strength tester analyzes your password using multiple criteria including length, character variety, entropy, and common patterns.
It provides real-time feedback as you type, showing strength scores, crack time estimates, and specific recommendations for improvement.
The tool also includes a password generator that creates cryptographically secure passwords based on your preferences.
Technical Details
Uses industry-standard password strength algorithms including zxcvbn library principles.
Calculates entropy using Shannon's formula: H = -Σ(p_i * log2(p_i)) where p_i is the probability of each character.
Crack time estimates are based on realistic attack scenarios using modern hardware capabilities.
All analysis is performed client-side using JavaScript - no passwords are transmitted.
About This Tool
This password strength tester helps you create and evaluate strong passwords that protect your accounts from various attack methods.
It analyzes passwords against brute force, dictionary, hybrid, and social engineering attacks to give you realistic security assessments.
The built-in password generator creates cryptographically secure passwords that are both strong and memorable.
All password analysis happens locally in your browser - your passwords never leave your device.