Password Strength Checker

Test your password security. See how long it would take to crack. Get instant recommendations.

Enter a password to test its strength:

🔒 Privacy: Your password is never sent to our servers. All analysis happens in your browser. We can't see what you type.

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About Password Strength Testing

How Password Strength is Calculated

Our password strength checker analyzes multiple factors including length, character variety (uppercase, lowercase, numbers, symbols), common patterns, and dictionary words. The tool calculates entropy (randomness) and estimates time-to-crack based on standard brute-force attack speeds. A strong password should have at least 12 characters with mixed character types.

What Makes a Password Strong?

A strong password combines length (12+ characters), variety (uppercase, lowercase, numbers, symbols), and unpredictability. Avoid common words, personal information, and predictable patterns. The best approach is using a passphrase with random words, or a password generator to create truly random combinations.

Common Password Mistakes

The most common password mistakes include using "password123" or similar obvious combinations, reusing passwords across sites, using personal information (birthdays, names), and simple patterns (123456, qwerty). These can be cracked in seconds. Our strength checker identifies these weaknesses and provides specific recommendations.

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