How to Check Your Password Strength (A Guide)

Creating a complex password is a great first step, but how do you know if it's genuinely secure? A password's true strength is determined by how long it would take a computer to guess it. To give you a clear, instant analysis, our free Password Strength Checker uses an advanced algorithm to measure your password's resistance to modern attacks.

This guide explains how password strength is measured and how to test yours privately and safely.

A free password strength checker tool analyzing the password 'Correct-Horse-Battery-Staple1!' and rating it as 'Very Strong'.

Get instant feedback and suggestions to improve your password's security.

Beyond Length: What Really Makes a Password Strong?

While length is important, modern password-cracking software is incredibly sophisticated. It doesn't just guess randomly; it uses massive lists of common words, names, dates, and predictable patterns (like "P@ssword123!"). Our tool uses the industry-standard "zxcvbn" library, which evaluates a password based on several factors:

  • Pattern Recognition: Does it match common dictionary words, names, or keyboard patterns (e.g., "qwerty")?
  • Character Variety: The mix of uppercase, lowercase, numbers, and symbols.
  • Entropy: A measure of its true randomness and unpredictability.

Based on this analysis, it provides a realistic estimate of how long it would take to crack, giving you a much more accurate picture of its security than a simple "weak/strong" label.

How to Use the Password Strength Checker

Our Password Strength Checker is designed with a "privacy-first" approach. The entire analysis happens on your computer within your browser. The password you type is never seen, stored, or sent to any server.

  1. Navigate to the Tool: Open the Password Strength Checker.
  2. Type Your Password: As you type, the tool will instantly analyze it in real-time.
  3. Review the Feedback: The tool will provide a score (from Very Weak to Very Strong), an estimated crack time, and actionable suggestions to improve your password if it identifies any weaknesses.

Your Security is in Your Hands

Checking your password's strength is a crucial step in protecting your online accounts. By understanding what makes a password vulnerable, you can create credentials that are truly secure against attacks. Test your password's strength today and take control of your digital security.