Password Strength Checker - Test Password Security Online Free
Check password strength and security. Get detailed analysis, security tips, and generate strong passwords. Improve your online security.
Privacy & Security
All password analysis happens locally in your browser. Your passwords are never sent to our servers or stored anywhere.
Password Strength Checker
Password Security Tips
✅ Do This
- • Use at least 12 characters
- • Mix uppercase, lowercase, numbers, and symbols
- • Use unique passwords for each account
- • Consider using a password manager
- • Enable two-factor authentication
- • Use passphrases with random words
❌ Avoid This
- • Don't use personal information
- • Avoid common passwords like "password123"
- • Don't use dictionary words alone
- • Avoid predictable patterns (123, abc)
- • Don't reuse passwords across sites
- • Don't share passwords with others
Real-time Analysis
Instant password strength analysis as you type.
Password Generator
Generate cryptographically secure passwords.
Privacy First
All analysis happens locally in your browser.
Detailed Feedback
Get specific suggestions to improve security.
Frequently Asked Questions
Password strength is calculated based on length, character variety (uppercase, lowercase, numbers, symbols), uniqueness, and absence of common patterns. Longer passwords with more character types score higher.
Yes, absolutely! All password analysis happens locally in your browser using JavaScript. Your password is never sent to our servers or stored anywhere. We prioritize your privacy and security.
A strong password has at least 12 characters, uses a mix of uppercase and lowercase letters, numbers, and special characters, avoids common words or patterns, and is unique to each account.
Yes, our password generator creates cryptographically secure passwords that are much stronger than human-created ones. However, make sure to store them securely in a password manager.
Change passwords immediately if there's a security breach, if you suspect compromise, or if you've shared them. For strong, unique passwords, regular changing isn't necessary unless required by your organization.