Password Strength Checker
Check how strong your password is. Get an estimated crack time and improvement suggestions.
5 of 5 uses remaining today
Strength-
Estimated Time to Crack
-
Based on 10 billion guesses/second (modern GPU cluster)
Password Criteria
At least 8 characters
At least 12 characters
Contains lowercase letters
Contains uppercase letters
Contains numbers
Contains symbols
No common patterns (123, abc, qwerty)
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Frequently Asked Questions
How is password strength calculated?▾
The tool evaluates length, character variety (lowercase, uppercase, numbers, symbols), character mixing, and checks for common patterns. Scores range from 0-100 mapped to five strength levels.
How is the estimated crack time calculated?▾
It assumes a modern GPU cluster attempting 10 billion guesses per second with a brute-force attack. The time represents the average case (half the total possible combinations).
Is my password sent to a server?▾
No. The password never leaves your browser. All analysis is performed with client-side JavaScript. No network requests are made.
What makes a strong password?▾
A strong password is at least 12 characters long, uses a mix of uppercase, lowercase, numbers, and symbols, and avoids common patterns like "password123" or repeated characters.