Password Strength Checker Guide
Master the art of password security analysis with our comprehensive guide to understanding and improving password strength.
🚀Quick Start
Visit the Tool
Go to our Password Strength Checker tool.
Enter Your Password
Type or paste your password into the input field. The analysis happens in real-time.
Review Results
Examine the strength score, entropy calculation, and detailed security metrics.
🔍Understanding Password Strength
Strength Levels
Key Factors
- • Length: Longer passwords are stronger
- • Character Variety: Mix of letters, numbers, symbols
- • Uniqueness: Avoid common patterns
- • Randomness: Avoid dictionary words
- • Personal Info: No personal details
🧮Understanding Entropy
Entropy measures the unpredictability of your password. Higher entropy means more security.
Entropy Formula
Entropy = log₂(Character Set Size^Password Length)Character Set Sizes
- • Lowercase letters: 26
- • Uppercase letters: 26
- • Numbers: 10
- • Common symbols: ~32
- • Extended symbols: ~94
Entropy Examples
- • "password123": ~28 bits
- • "MyP@ssw0rd!": ~65 bits
- • "Tr0ub4dor&3": ~70 bits
- • "correct horse battery staple": ~44 bits
📊Security Metrics Explained
Crack Time Estimation
How long it would take to crack your password using brute force attacks.
- • Instant: Common passwords
- • Seconds: Simple patterns
- • Minutes: Basic complexity
- • Hours: Good complexity
- • Days/Years: Strong passwords
- • Centuries: Very strong passwords
Attack Vectors
- • Dictionary Attack: Common words
- • Brute Force: All combinations
- • Hybrid Attack: Words + numbers
- • Social Engineering: Personal info
Common Weaknesses
- • Sequential characters (123, abc)
- • Repeated characters (aaa, 111)
- • Keyboard patterns (qwerty)
- • Personal information
- • Dictionary words
- • Common substitutions (@ for a)
Best Practices
- • Use at least 12 characters
- • Mix character types
- • Avoid patterns
- • Use unique passwords
- • Consider passphrases
- • Use a password manager
⚡Advanced Features
Real-time Analysis
Get instant feedback as you type. See your password strength improve in real-time.
Detailed Breakdown
Understand exactly what makes your password strong or weak with detailed metrics.
Security Recommendations
Get specific suggestions on how to improve your password's security.
Privacy Protection
All analysis happens locally in your browser. Your passwords never leave your device.
Multiple Algorithms
Uses multiple security algorithms to provide comprehensive password analysis.
Export Results
Save your password analysis results for future reference or security audits.
💡Common Scenarios
Creating a New Password
Use our Password Generator to create a strong password, then check its strength.
- • Generate a password with our tool
- • Copy it to the strength checker
- • Verify it meets your security requirements
- • Adjust settings if needed
Auditing Existing Passwords
Check the strength of your current passwords to identify weak ones that need updating.
- • Test each of your passwords
- • Identify weak or compromised ones
- • Prioritize updating the weakest first
- • Use our leak checker for additional verification
Password Policy Compliance
Ensure your passwords meet organizational or service-specific requirements.
- • Check minimum length requirements
- • Verify character type requirements
- • Ensure complexity standards are met
- • Document compliance for audits
🔗Related Tools
❓Frequently Asked Questions
Is my password safe when I check it?
Yes! All password analysis happens locally in your browser. Your password never leaves your device or gets transmitted to our servers.
What's a good entropy score?
Aim for at least 60 bits of entropy for strong passwords. Very strong passwords typically have 80+ bits of entropy.
Should I use passphrases or random passwords?
Both can be secure! Passphrases are easier to remember, while random passwords are harder to guess. Choose based on your needs and use a password manager.
How often should I check my passwords?
Check passwords when creating new accounts, updating existing ones, or if you suspect a security breach. Regular audits help maintain security.