🔒 Password Strength Checker

🔑 Password Input

Length: characters

📋 Context (Optional)

💡 Password Examples

🛠️ Password Generator Tips

  • • Use a password manager for unique passwords
  • • Try passphrases:"correct-horse-battery-staple"
  • • Add personal tweaks to memorable phrases
  • • Consider using our Password Generator

📊 Strength Analysis

Strength Score: (/100)
Time to crack: Instant
Entropy: bits
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✅ Positive Factors

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⚠️ Improvement Suggestions

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🎲 Password Generation Tips

Passphrase Method: correct-horse-battery-staple-2024!
First Letter Method: IlMf1tHa2c! (I love My family 1st they Have 2 cats!)
Random with Personal Touch: Kj#8mN$p_MyDog2024
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ℹ️ About Password Strength Analysis

Password Strength Checker analyzes passwords to determine their security level and resistance to various attack methods. It evaluates multiple factors including length, character variety, patterns, and entropy to provide comprehensive security feedback. The recommendations align with modern verifier guidance from NIST SP 800-63B and practical password-storage guidance from the OWASP Password Storage Cheat Sheet.

Analysis Factors:

  • Password length and complexity
  • Character variety (uppercase, lowercase, numbers, symbols)
  • Common password detection
  • Pattern recognition (keyboard walks, sequences)
  • Entropy calculation (randomness measure)
  • Estimated crack time with modern hardware

Security Tips:

  • Use at least 12 characters (16+ is better)
  • Mix uppercase, lowercase, numbers, and symbols
  • Avoid common words and patterns
  • Don't reuse passwords across sites
  • Consider using a password manager
  • Use passphrases for memorable security

Limitations: a strength score is an estimate, not proof that a password has never been leaked. Check real authentication systems against breach blocklists, rate limiting, MFA, lockout policy, and password-hash storage.

Privacy note: this tool runs entirely in your browser. No passwords are sent to our servers.

API Usage Example:

POST /api/tools/crypto/password-strength
Content-Type: application/json

{
    "password": "MySecurePassword123!",
    "username": "john_doe",
    "commonWords": [
        "john",
        "doe",
        "company"
    ]
}
Ready