Free Password Strength Checker
Check your password strength and get security recommendations. Test password entropy and vulnerability.
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Frequently Asked Questions
How is password strength scored?
Strength is scored on length, character variety (lowercase, uppercase, digits, symbols), and absence of common patterns. Each factor contributes to the final score from Weak to Very Strong.
Is my password sent to a server?
No. All password checking happens entirely in your browser using JavaScript. Your password is never transmitted to any server or stored anywhere.
What makes a password weak even if it is long?
Common patterns like "password123", dictionary words, keyboard walks (qwerty, 12345), and repeated characters are all weak regardless of length. True randomness is more important than length alone for moderate lengths.