Password Strength Checker: Test How Strong Your Password Is | Free
0 uses—
Password Strength Tips
8 Security Checks
Tests for length, uppercase, lowercase, numbers, special characters, repetition, and common passwords.
Crack Time Estimate
See how long it would take to brute-force your password based on entropy calculation.
Visual Strength Meter
Color-coded meter from Very Weak (red) to Very Strong (green) with real-time updates.
100% Private
Your password never leaves your browser. All checking happens locally using JavaScript.
Frequently Asked Questions
How is password strength calculated?
Based on 8 criteria: length (8+ and 12+), uppercase, lowercase, numbers, special chars, no repetition, and not a common password. Entropy is also calculated.
Is it safe to type my password here?
Yes, completely safe. All processing happens in your browser. No data is sent to any server.
What makes a strong password?
12+ characters with a mix of uppercase, lowercase, numbers, and special characters. Avoid common words and repeated characters.
Is this free?
Yes.
How accurate is the crack time estimate provided by a password strength tool?
The crack time estimate is a computational prediction based on current brute-force attack capabilities and your password's entropy. While it offers a strong indication of vulnerability, it's a theoretical estimate, not a guarantee. Real-world cracking depends on many factors, including attacker resources and methods. Use it as a powerful guide to assess and improve your password security, always aiming for estimates in years or millennia.
How to Check Password Strength
- Type your password in the input field
- View the strength meter and score
- Check which criteria pass or fail
- Adjust your password to pass all checks