See how fast a hacker could break your password - and learn why it matters.

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2,200 cyberattacks happen every single day That's one attack every 39 seconds. Weak passwords are the #1 entry point for hackers worldwide.
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81% of data breaches are caused by stolen or weak passwords Verizon's Data Breach Report found that the vast majority of hacking-related breaches use compromised credentials.
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The password "123456" has appeared in over 42 million breaches Despite years of warnings, simple passwords remain staggeringly common. "password" and "qwerty" aren't far behind.
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Adding one character can multiply crack time by 95x Every extra character exponentially increases the number of combinations an attacker must try. Length beats complexity.
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Test Your Password Strength

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The number of characters in your password. Longer passwords are exponentially harder to crack. Aim for 14+ characters.
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Length
The size of the character set used. Lowercase adds 26, uppercase adds 26, digits add 10, and symbols add 33. A larger pool means more possible combinations per character.
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Pool
A measure of randomness in bits. Higher entropy means the password is harder to guess. Calculated as length × log²(pool size). Above 60 bits is considered strong.
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Entropy
The total number of possible passwords with this length and character set. For example, 2 uppercase letters = 26 × 26 = 676 possible combinations (AA through ZZ) - not just rearrangements of your specific letters.
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Combos
Try a strong password
Quick tips for a stronger password
  • Never reuse passwords across accounts
  • Mix upper, lower, digits & symbols
  • Use 14+ characters minimum
  • Avoid dictionary words & names
  • Use a password managers such as Bitwarden or ProtonPass
  • Enable two-factor authentication wherever possible
Learn more
How Strong Is My Password? What Makes a Good Password? Password Strength Tips Common Password Mistakes 8-Character Password Risk Brute Force Calculator Best Password Managers 2026 What Is a Passkey?

Free Password Strength Checker & Security Tester

Our password strength checker lets you test any password and instantly see how long it would take to crack using a brute-force attack at 10 billion guesses per second. Whether you're creating a new account or auditing your existing passwords, this tool gives you a clear picture of your password security.

How Does the Password Strength Test Work?

When you type a password into our checker, it calculates the total number of possible combinations based on the character types you've used (lowercase, uppercase, digits, and symbols) and the length of your password. It then estimates how long a brute-force attack would take at modern hardware speeds. The result is displayed as a crack time - from "Instantly" for weak passwords to "trillions of years" for strong ones.

Is This Password Checker Safe to Use?

Yes - your password never leaves your browser. All calculations happen locally in JavaScript. We don't store, transmit, or log anything. There are no analytics trackers, no cookies, and no server-side processing. This is the safest way to check how strong your password is.

What Makes a Strong Password?

A strong password is long (14+ characters), uses a mix of character types, avoids dictionary words and common patterns, and is unique to each account. Read our full guide on what makes a good password or check out our password strength tips for practical advice.