Password Strength Calculator

Category: Various Measurements/Units
- March 22, 2025
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Check the strength of your password with this calculator. Enter your password and get detailed analysis on its security level, estimated crack time, and suggestions for improvement.

Enter Your Password

Password Strength: Not Entered

Analysis Options

About Password Security

Password security is essential for protecting your online accounts and personal information from unauthorized access.

What Makes a Strong Password?
  • Length: Longer passwords are generally more secure. Aim for at least 12 characters.
  • Complexity: Use a mix of uppercase letters, lowercase letters, numbers, and special characters.
  • Unpredictability: Avoid common words, phrases, or patterns.
  • Uniqueness: Use different passwords for different accounts.
Common Password Attacks
  • Brute Force: Trying every possible combination of characters.
  • Dictionary Attack: Trying common words and variations.
  • Credential Stuffing: Using previously breached username/password combinations.
  • Social Engineering: Manipulating users to reveal their passwords.
Best Practices for Password Management
  • Use a different password for each important account.
  • Consider using a password manager to generate and store strong passwords.
  • Enable two-factor authentication (2FA) whenever possible.
  • Change passwords periodically, especially for sensitive accounts.
  • Be cautious of phishing attempts seeking your password information.

What Is the Password Strength Calculator?

The Password Strength Calculator is a tool that helps you assess how secure your password is. It analyzes various aspects of your password, such as length, character variety, and predictability, to provide a security score. This helps you understand how resistant your password might be to different types of attacks, such as brute force or dictionary attacks.

With this calculator, you can instantly:

  • Check your password's strength score (out of 100)
  • See how long it might take for attackers to crack it
  • Get suggestions to make your password stronger
  • Generate a secure password if needed

How Password Strength Is Calculated

The calculator uses multiple factors to evaluate a password, each contributing to the total score. These include:

  • Length – Longer passwords score higher
  • Character Mix – Use of uppercase, lowercase, numbers, and symbols
  • Complexity – Avoiding patterns and repetitions
  • Uniqueness – Avoiding common passwords and predictable formats

These components are scored individually and added up to create a final score out of 100. Higher scores indicate stronger passwords.

Password Crack Time Formula

Estimated Time to Crack:

\( \text{Time} = \frac{2^{\text{Entropy}}}{2 \times \text{Attempts Per Second}} \)

The calculator uses this formula to estimate how long it would take an attacker to guess your password. The entropy is calculated based on the variety and length of characters used, while the number of attempts per second depends on the selected attack scenario.

How to Use the Calculator

Using the Password Strength Calculator is simple and takes just a few steps:

  • Enter your password in the input field
  • Choose an attack scenario from the dropdown menu
  • Select whether you want to view detailed analysis and suggestions
  • Click "Analyze Password" to see the results
  • If you need help, click "Generate Strong Password" for a ready-made secure option
  • Click "Reset" to clear everything and start again

Understanding the Results

After analyzing, you'll see:

  • Overall Score: A number out of 100, rating your password’s strength
  • Estimated Crack Time: How long it might take an attacker to guess your password
  • Detailed Analysis: Breakdown of length, character types, complexity, and uniqueness
  • Character Breakdown: Count of uppercase, lowercase, numbers, and symbols
  • Suggestions: Tips to improve weak areas of your password
  • Warnings: Alerts if your password includes risky patterns or common words

Why This Tool Is Useful

This tool helps you build better, safer passwords that are harder to guess or break. It's especially helpful for:

  • Protecting your online accounts
  • Checking if your current password is strong enough
  • Learning how to improve weak passwords
  • Creating secure passwords quickly

Good password habits reduce your risk of being hacked. This tool makes it easy to stay informed and secure.

Frequently Asked Questions (FAQ)

What score should I aim for?

A score above 80 is considered strong. Aim for as high as possible for important accounts like email, banking, or cloud services.

What makes a password easy to crack?

Short passwords, predictable patterns, repeated characters, or words found in common password lists can all make your password easier to crack.

Can I trust this tool with my real passwords?

The calculator runs in your browser and does not send data anywhere. However, it’s best practice not to test sensitive or actual passwords in any online tool. Use it to test examples or generate strong alternatives.

What is an "offline" vs. "online" attack?

Online attacks are limited by server speed and usually have protections like account lockout. Offline attacks happen when hackers steal hashed passwords and try to crack them without limits, often using powerful hardware.

How often should I update my passwords?

Update passwords regularly, especially if there’s a breach or if the password is reused elsewhere. Using a password manager can help keep track.