Password Strength Meter
Free password strength meter. Evaluate password security with real-time scoring. All processing is local.
Enter a password above
Enter a password to analyze its strength.
How to Use Password Strength Meter
Enter a Password
Type any password into the input field. The tool analyzes it in real-time — no data is sent anywhere.
Review the Score
The strength bar shows the overall score. A detailed checklist shows which criteria your password meets.
Improve Your Password
Use the checklist to identify weaknesses. Add length, mix character types, and avoid common words.
Frequently Asked Questions
How is password strength calculated?
This tool evaluates length, character variety (lowercase, uppercase, numbers, symbols), and estimates entropy. A strong password is at least 12 characters with a mix of all character types.
What is password entropy?
Entropy measures unpredictability in bits. Higher entropy means more possible combinations. 60+ bits is considered strong. Entropy = log₂(charset^length).
Is this tool safe to use?
Yes, all processing happens locally in your browser. Your password is never sent to any server, never stored, and never logged.