Password Strength Checker
Test your password security with detailed strength analysis, entropy calculation, and crack time estimates.
Enter a password to check
Strength Score
0/100
Entropy
0 bits
Crack Time
Instant
Security Checklist
How to Create a Strong Password
- Use at least 12 characters (longer is better)
- Mix uppercase and lowercase letters
- Include numbers and special symbols
- Avoid common words, names, and keyboard patterns
- Don't reuse passwords across different accounts
- Consider using a password manager
- Use passphrases made of random words
Understanding the Metrics
Entropy: Measures password randomness in bits. Higher is better. 60+ bits is good, 80+ is excellent.
Crack Time: Estimated time for a computer to guess your password using brute force attacks.
Strength Score: Overall rating from 0-100 based on length, complexity, and security best practices.