Password Strength Checker: How Secure Is Your Password?

Your password is the first line of defence for your online accounts. Here's how to create and verify truly secure passwords.

What Makes a Password Strong?

A strong password typically has:

• Length — 12+ characters (longer is always better)
• Complexity — Mix of uppercase, lowercase, numbers, and symbols
• Unpredictability — No dictionary words, names, or common patterns
• Uniqueness — Different password for every account

Common Password Weaknesses

Our Password Strength Checker detects:

• Common passwords (like "password123" or "qwerty")
• Sequential characters (abcd, 1234)
• Repeated characters (aaa, 111)
• Dictionary words and their variations
• Personal information patterns (birthdates, names)

Password Entropy Explained

Entropy measures how unpredictable a password is, measured in bits. Each bit doubles the number of possible guesses. A password with 50+ bits of entropy is considered strong. Our tool calculates entropy in real-time.

Tips for Better Passwords

• Use a passphrase: a sequence of random words like "correct-horse-battery-staple"
• Use a password manager to generate and store complex passwords
• Enable two-factor authentication wherever possible
• Never reuse passwords across important accounts

Try our Password Strength Checker to test your passwords instantly and securely — all analysis is done locally in your browser.