Password Strength Checker: Test How Safe Your Password Is

This free tool estimates how long it would take an attacker to crack your password. Type or paste a password and you’ll see a strength rating, an estimated crack time, and tips for making it stronger. The check runs entirely in your browser, so your password is never sent anywhere or stored.

How the Strength Checker Works

The tool uses zxcvbn, an open-source password analyzer originally built by Dropbox. Instead of just counting character types, it looks at the things attackers actually exploit: common passwords, dictionary words, names, repeated characters, keyboard patterns like qwerty, and predictable substitutions such as P@ssw0rd. It then estimates the number of guesses needed to crack the password and turns that into a realistic time to crack.

Because of this, a password that looks complex can still score poorly if it follows a pattern a cracking tool already knows. That is usually more useful than a simple “has a number and a symbol” rule.

How to Read Your Result

• Strength rating. A score from Very Weak to Very Strong, with a colored bar for a quick read.
• Time to crack. An estimate of how long an offline attack would take to guess your password at high speed.
• Suggestions. Specific advice, such as adding length or avoiding a common word, when the password can be improved.

What Counts as a Strong Password?

Length is the biggest factor. A password of 16 characters or more is far harder to crack than a short one, even if the short one mixes in symbols. Randomness comes next, since anything predictable gives attackers a shortcut. Finally, every password should be unique, because reusing one means a single breach can expose several accounts at once.

If you need to create a new password, our Password Generator builds strong, random passwords and passphrases for you.

Is It Safe to Type My Password Here?

Yes. The analysis happens locally in your browser, and nothing you type is sent to a server, logged, or saved. You can confirm this by turning off your internet connection: the checker keeps working. As a habit, it’s still best to test passwords that resemble yours rather than your exact live credentials, and to store real passwords in a password manager.

Frequently Asked Questions

Protect Your Accounts

A strong, unique password for every account is one of the simplest ways to stay safe online. Pair it with two-factor authentication and a trusted VPN to keep your data private on any network.