Free Password Strength Checker - Test Password Security

Yes, completely safe. All password analysis happens entirely in your browser using JavaScript—your password never gets transmitted to any server, stored in any database, or seen by anyone. You can verify this by disconnecting your internet after loading the page; the tool still works. However, never enter passwords into checkers you don't trust.

Length isn't everything. Passwords like "passwordpasswordpassword" (24 characters!) are still weak because they're predictable. Common patterns like "January2024!" or "Company@123" are also weak despite length. Strong passwords need randomness and variety. "J9$mK#2pL@8nQ!5r" (16 chars) is much stronger than "ILoveMyDog2024!" (16 chars) because it's less predictable.

Crack time estimates how long it would take an attacker with standard computing power to guess your password through brute-force attacks (trying every possible combination). "Instant" means seconds. "Days" means vulnerable to targeted attacks. "Years" means resistant to most attacks. "Centuries" means practically unbreakable with current technology. Note: this assumes the attacker has the password hash, not your actual account.

Absolutely! Weak passwords can be cracked in seconds to hours. Change it immediately, especially for important accounts (email, banking, social media). Use our password generator to create a strong random password, then store it in a password manager. Never reuse passwords across accounts—if one site gets breached, hackers try those credentials everywhere.