Password Strength Checker

Enter your password to check its strength

How It Works

This password checker evaluates your password based on several key factors:

  • Character variety (uppercase, lowercase, numbers, symbols)
  • Password length and complexity
  • Similarity to top one million passwords
  • Entropy (measure of randomness)

Tips for Strong Passwords

  • Use at least 12 characters - longer passwords are harder to crack
  • Mix uppercase, lowercase, numbers, and special characters
  • Avoid personal information (birthdays, names, etc.)
  • Don't use common word patterns or keyboard patterns (qwerty, 123456)
  • Consider using a password manager to generate and store secure passwords

Understanding Entropy

Entropy measures the unpredictability of your password:

  • Below 40 bits: Very weak, easily crackable
  • 40-60 bits: Moderate strength
  • 60-80 bits: Strong
  • 80+ bits: Very strong, suitable for sensitive accounts

About Time-to-Crack

The time-to-crack estimate assumes:

  • A high-end computer making 10 billion guesses per second
  • No prior knowledge of the password pattern
  • Brute force attack methodology

Real-world scenarios may vary based on the attacker's resources and methods.