Password Strength Checker
Analyze password strength with entropy calculation, estimated crack time, and security recommendations.
Password Security - Technical Details
Password entropy measures the randomness and unpredictability of a password. Higher entropy means more secure. Good passwords should have 60+ bits of entropy, use mixed character types, and avoid common patterns.
Command-line Alternative
// Entropy formula\nEntropy = log2(possible_chars ^ length)\n\n// Example: 12-char with 94 chars = 78.8 bits\nlog2(94^12) ≈ 78.8 bits