Password Strength
Checker
Analyze password strength and security with real-time feedback. Get detailed insights on vulnerabilities, crack time estimates, and personalized recommendations to improve your password security.
Enter Password to Check
Comprehensive Password
Security Analysis
From personal email accounts to enterprise authentication systems, our password strength checker provides real-time security analysis with detailed vulnerability detection, entropy calculations, and crack time estimates.
Whether you're auditing existing passwords, or creating new credentials for sensitive accounts, analyze with confidence using our advanced password strength checker.
How Password Strength Analysis Works
Simple Steps:
- 1Enter your password in the secure input field - all analysis happens in your browser
- 2View real-time strength score (0-100%) with visual indicators for security level
- 3Review character composition: lowercase, uppercase, numbers, and symbols detected
- 4Check entropy calculation and estimated crack time with modern hardware assumptions
- 5Analyze vulnerability detection: keyboard walks, patterns, dictionary words, sequences
- 6Read personalized security recommendations to improve password strength
- 7Verify overall security score based on length, complexity, uniqueness, patterns, and dictionary checks
Pro Tips:
- Use at least 16 characters with all character types for strong security
- Avoid dictionary words, personal information, and common patterns
- Check for keyboard walks (qwerty, asdfgh) and sequential characters (abc, 123)
- Aim for 60+ bits of entropy and 80%+ unique characters
- Enable two-factor authentication (2FA) even with strong passwords
- Use a password manager to generate and store truly random passwords
- Change weak passwords immediately, strong passwords can last 6-12 months
- Never reuse passwords across different accounts or services
Common Use Cases
Password Policy Compliance
Verify passwords meet organizational security requirements and industry standards
Account Security Audit
Evaluate existing password strength across personal and business accounts
User Education & Training
Teach users about password security through interactive strength analysis
Password Migration Planning
Assess current passwords before system upgrades or security enhancements
Security Incident Response
Quickly evaluate compromised passwords and determine replacement urgency
Development & Testing
Validate password strength requirements in authentication systems
Frequently Asked Questions
🔐 Advanced Password Analysis & Technical Details
1 Strength Calculation Algorithm
Our password strength algorithm evaluates three key components to provide an accurate 0-100% security score:
📏 Length Score (40 pts)
🔤 Variety Score (40 pts)
🧩 Complexity Score (20 pts)
Strength Rating Scale
2 Entropy & Crack Time Analysis
Password entropy measures randomness and unpredictability. Higher entropy means exponentially more possible combinations:
Entropy Formula
Character Pool Impact
Crack Time Examples
| Password Type | Entropy | Crack Time |
|---|---|---|
| 8 chars, lowercase only | ~38 bits | 2 seconds |
| 10 chars, mixed case + numbers | ~60 bits | 6 years |
| 12 chars, all types | ~79 bits | 34,000 years |
| 16 chars, all types | ~104 bits | 200 million years |
| 20 chars, all types | ~131 bits | 100+ trillion years |
* Assumes 100 billion guesses/second on modern hardware
3 Vulnerability Pattern Detection
Our analyzer detects common password vulnerabilities that significantly weaken security:
⌨️ Keyboard Walks
Examples:
Easy to guess, commonly tested in attacks
🔁 Repeated Sequences
Examples:
Repeating patterns reduce effective password length
📚 Dictionary Words
Examples:
Dictionary attacks test millions of common words
🔢 Sequential Characters
Examples:
Predictable sequences are easily guessed
4 Password Security Best Practices
✅ Recommended Practices
- •Use 16+ characters: Longer passwords are exponentially more secure. For critical accounts, use 20-32 characters.
- •Mix all character types: Include uppercase, lowercase, numbers, and symbols for maximum strength.
- •Use a password manager: Generate and store truly random passwords. You only need to remember one master password.
- •Enable 2FA/MFA: Two-factor authentication adds critical extra protection even if password is compromised.
- •Unique per account: Never reuse passwords. A breach on one site shouldn't compromise all accounts.
❌ Practices to Avoid
- •Dictionary words: Avoid common words, names, or phrases. Use random character combinations instead.
- •Personal information: Never use birthdates, addresses, phone numbers, or family names.
- •Keyboard patterns: Avoid qwerty, asdfgh, 12345, and other sequential keyboard patterns.
- •Simple substitutions: P@ssw0rd is still weak. Hackers know common letter-to-symbol substitutions.
- •Short passwords: Anything under 12 characters is vulnerable to brute-force attacks.
Ideal Password Characteristics
5 Password Change & Maintenance Schedule
Optimal password change frequency depends on strength and risk level:
| Strength Level | Change Frequency | Risk Assessment |
|---|---|---|
| Vulnerable (0-29%) | Change Immediately | Critical security risk |
| Weak (30-49%) | Every 1-3 months | High vulnerability |
| Moderate (50-69%) | Every 3-6 months | Moderate risk |
| Strong (70-84%) | Every 6-12 months | Low risk |
| Unbreakable (85-100%) | Every 12+ months | Minimal risk |
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