Password Strength Checker

A strong password is your first line of defense. This tool evaluates your password against 7 security criteria and shows an estimated crack time based on entropy. Everything runs in your browser — nothing is stored or transmitted.

Processed on your deviceNo signup required100% free
Enter a password
Password

Type a password to check its strength

Real-time analysis with crack time estimation. Nothing is stored or transmitted.

How to Use

  1. Type or paste a password into the input field.
  2. Toggle the eye icon to show or hide the password.
  3. Watch the strength meter update in real time.
  4. Review which criteria pass or fail in the checklist.
  5. Check the estimated crack time to understand security level.

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Frequently Asked Questions

How is crack time calculated?
It estimates time assuming 10 billion guesses per second, which represents a large-scale brute-force attack using modern hardware.
Is my password sent anywhere?
No. All analysis happens locally in your browser. Nothing is stored or transmitted.
What makes a strong password?
Use 12+ characters with a mix of uppercase, lowercase, numbers, and special characters. Avoid common patterns like 'password' or '123456'.