Test and improve your password security instantly. All analysis happens locally in your browser — your password is never transmitted or stored.
A password strength checker evaluates how resistant a password would be to guessing and brute-force attacks. It analyzes multiple security dimensions including length, character variety (uppercase, lowercase, digits, special characters), and common pattern detection.
Unlike a simple character counter, this tool provides actionable feedback — showing exactly which criteria your password meets and which it fails. This helps you strengthen weak spots rather than guessing what's missing.
The checker runs entirely in your browser using JavaScript. It evaluates your password against seven security factors:
password123, qwerty, letmein, etc.).The combined score maps to a strength level (Very Weak → Strong), displayed as a color-coded progress bar.
Absolutely. All password analysis happens locally in your browser using JavaScript. Your password is never sent to any server or stored anywhere. It exists only temporarily in your browser's memory while checking.
Strong passwords are long (16+ characters), use a mix of uppercase, lowercase, numbers, and special characters, and avoid common words or patterns. Random passwords generated by a password manager are typically strongest.
We check your password against a list of commonly used weak passwords like "password123" or "qwerty". Even if your password meets other criteria, using a common password makes it vulnerable to dictionary attacks.
Our checker provides a reliable assessment based on standard security best practices. However, no tool can predict every possible attack vector. Always use unique passwords for each account and enable two-factor authentication when available.