Check your password strength with detailed analysis. See which criteria your password meets and get suggestions for improvement.
A strong password is your first line of defense against unauthorized access to your accounts. This checker analyzes your password against multiple criteria: length (longer is exponentially stronger), character variety (uppercase, lowercase, numbers, and symbols), absence of common patterns, and whether it appears in known data breach lists. The strength score gives you an instant sense of how long it would take an attacker to crack your password using brute force — a 8-character all-lowercase password can be cracked in seconds, while a 16-character mixed-case password with symbols would take millions of years. All analysis runs locally in your browser — your password is never transmitted anywhere.
Absolutely not. This tool analyzes your password entirely in JavaScript running in your browser. Your password never leaves your device.
Length is the most important factor. Use at least 12–16 characters. Add uppercase, lowercase, numbers, and symbols. Avoid dictionary words, keyboard patterns (qwerty123), and personal information.
Yes! Passphrases (e.g., 'correct-horse-battery-staple') are long, memorable, and very secure. Four random common words joined with hyphens can be stronger than a complex 8-character password.
Modern security guidance (NIST) says change passwords only when you suspect a breach, not on a fixed schedule. Use a unique password for every site and a password manager to remember them.
Both! A strong unique password + 2FA (like an authenticator app) provides the best security. Even if your password is stolen, 2FA prevents unauthorized access.