Password Strength Checker

Test your password security and get instant feedback with detailed analysis and improvement suggestions.

Privacy Note: Your password is analyzed locally in your browser. It is never sent to any server or stored anywhere.

Try These Examples:

Tips for Creating Strong Passwords

  • •Use at least 12 characters (longer is better)
  • •Mix uppercase, lowercase, numbers, and special characters
  • •Avoid common words, names, and dates
  • •Don't use sequential or repeating characters
  • •Use unique passwords for different accounts
  • •Consider using a passphrase (e.g., "Coffee$Makes!Me#Happy7")
  • •Use a password manager to store complex passwords securely

How to Use the Password Strength Checker

  1. Type or paste your password into the input field
  2. View the instant strength score and rating
  3. Read the detailed security analysis and feedback
  4. Follow the suggestions to improve your password
  5. Check the requirements checklist to ensure compliance
  6. See estimated crack time based on current computing power
  7. Try example passwords to understand strength differences

Best Password Strength Checker Features

  • Real-Time Analysis: Instant feedback as you type
  • 100-Point Scale: Clear numerical strength rating
  • Detailed Feedback: Specific suggestions for improvement
  • Crack Time Estimation: See how long to break your password
  • Requirements Checklist: Visual indicators for all criteria
  • Privacy-First: All analysis done locally in your browser
  • Common Password Detection: Warns against known weak passwords
  • Pattern Recognition: Identifies sequential and repeating characters

What Makes a Password Strong?

  • Length: Minimum 8 characters, 12+ recommended, 16+ for highest security
  • Complexity: Mix of uppercase, lowercase, numbers, and special characters
  • Unpredictability: Avoid dictionary words, names, and dates
  • Uniqueness: Different passwords for different accounts
  • No Patterns: Avoid keyboard patterns (qwerty) or sequences (abc123)
  • No Personal Info: Don't use birthdays, names, or addresses

Common Password Mistakes to Avoid

  • Using the same password across multiple accounts
  • Including personal information like names or birthdates
  • Using common words or phrases ("password", "letmein")
  • Simple substitutions (p@ssw0rd instead of password)
  • Short passwords under 8 characters
  • Sequential numbers or letters (123456, abcdef)
  • Keyboard patterns (qwerty, asdfgh)
  • Storing passwords in plain text files

Password Strength Levels Explained

  • Very Weak (0-29): Can be cracked instantly, extremely vulnerable
  • Weak (30-49): Can be cracked quickly, high risk
  • Fair (50-69): Basic protection, still vulnerable to attacks
  • Strong (70-84): Good protection, difficult to crack
  • Very Strong (85-100): Excellent protection, very difficult to crack

How Password Cracking Works

Hackers use several methods to crack passwords:

  • Brute Force: Trying every possible combination
  • Dictionary Attack: Testing common words and phrases
  • Rainbow Tables: Pre-computed hash lookups
  • Credential Stuffing: Using leaked passwords from other breaches
  • Social Engineering: Tricking users into revealing passwords

Password Security Best Practices

  • Enable two-factor authentication (2FA) whenever possible
  • Use a reputable password manager
  • Change passwords immediately if you suspect a breach
  • Never share passwords via email or messaging apps
  • Use different passwords for work and personal accounts
  • Regularly update important account passwords
  • Be cautious of phishing attempts
  • Don't save passwords in your browser without encryption

Why Use Our Password Strength Checker?

Our free password strength checker provides instant, comprehensive analysis of your password security. Unlike basic checkers, we analyze multiple factors including length, complexity, common patterns, and vulnerability to different attack methods. You get a clear strength score, detailed feedback, and actionable suggestions to improve your password. Best of all, your password never leaves your browser - all analysis is done locally for complete privacy. Perfect for creating strong passwords for important accounts, testing existing passwords, or learning about password security best practices.