Password Strength Checker

Analyze password strength & security

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About Password Strength Checker

A client-side password strength analyzer that evaluates passwords based on entropy, character diversity, length, and common pattern detection. Calculates estimated crack times for brute-force and dictionary attacks, identifies weaknesses (sequential characters, repeated patterns, common words), and provides actionable improvement suggestions. No passwords are ever sent to a server — all analysis happens in your browser. Essential for security-conscious users and developers building authentication systems.

Password Strength Checker Features

  • Entropy calculation
  • Crack time estimate
  • Pattern detection
  • Improvement tips
  • 100% client-side

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