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Password Strength Checker

Today, most of what we own is online. Like every physical asset you own, these online assets equally need protection. A password is like a gate or any form of security you use in protecting what you have. This ensures that no unauthorized person gains access to your information. However, with a guess in the right direction from the wrong person, this security can be breached. If your password is something you choose among the common categories out there like your date of birth or that of family, others can easily figure it out.

Is there any way to avoid this? There is, and it does not involve you thinking up a long random password that you might not remember eventually. Using the right algorithm, you can determine if a password you are convenient with is secure enough. To this end, we will consider some premium quality algorithms that would curtail the use of weak passwords.

Password Strength Checker

What is a Password Strength Checker?

A Password Strength Checker is a tool designed to evaluate the strength of a password based on various criteria. It helps users create secure passwords by providing real-time feedback and suggestions for improvement. The primary goal of these checkers is to ensure that passwords are resilient against various types of cyber attacks, thereby enhancing overall security.

A Password Strength Checker is a software utility that analyzes a password to determine its robustness and provides feedback on its strength. It assesses the password against established security criteria, helping users understand whether their passwords are strong enough to protect their accounts and sensitive information.

The basic concept of a Password Strength Checker revolves around evaluating the password based on several factors such as length, complexity, and unpredictability. The checker then provides a strength rating (e.g., weak, fair, strong) and often suggests ways to improve the password. This process helps users create passwords that are more difficult for attackers to guess or crack.

How Password Strength Checkers Work

  1. Input Analysis: The user enters a password into the strength checker.

  2. Evaluation Criteria: The tool evaluates the password based on predefined criteria, which typically include:

  • Length: Longer passwords are generally more secure.

  • Complexity: The inclusion of uppercase and lowercase letters, numbers, and special characters.

  • Pattern Recognition: Identification of common patterns or sequences that make passwords predictable.

  • Dictionary Comparison: Checking against a database of commonly used or breached passwords.

Scoring System: The checker assigns a score or rating to the password, indicating its strength (e.g., weak, medium, strong).

Feedback and Suggestions: The tool provides feedback on the password’s weaknesses and offers suggestions for making it stronger, such as adding more characters, mixing character types, or avoiding common words and patterns.

Password Strength Checkers use various algorithms and techniques to assess password strength. Some of the common methods include:

  1. Entropy Calculation: Entropy measures the unpredictability and randomness of a password. Higher entropy indicates a stronger password. Entropy is calculated based on the length and complexity of the password.

  • Formula: Entropy (in bits) = log2(Number of possible characters^password length)

  1. Pattern Matching: This technique identifies common patterns in passwords, such as repeated characters, sequences (e.g., "123456"), or keyboard patterns (e.g., "qwerty"). Patterns reduce the complexity and predictability of passwords.

  2. Dictionary Attack Prevention: Passwords are compared against a list of commonly used or breached passwords stored in a dictionary. If a password matches any entry in the dictionary, it is deemed weak.

  3. Heuristic Rules: These are predefined rules that check for specific characteristics in passwords. For example, a rule might require at least one uppercase letter, one lowercase letter, one number, and one special character.

  4. Machine Learning Models: Advanced password strength checkers may use machine learning models trained on large datasets of passwords to predict the likelihood of a password being cracked. These models can provide more accurate assessments based on patterns observed in real-world password breaches.

  5. NIST Guidelines: Many password strength checkers follow guidelines set by the National Institute of Standards and Technology (NIST). These guidelines provide best practices for creating and evaluating passwords, focusing on length, complexity, and resistance to common attack methods.

By leveraging these algorithms and techniques, Password Strength Checkers offer a comprehensive evaluation of password security, guiding users to create stronger, more secure passwords.

Features of Password Strength Checkers

Almost every security meter has a straightforward layout. In the least, those that will appear in this article are very direct. Except for NordPass which would require you to scroll past some content before you find the blank space.

The security meter; In the SST strength checker, this meter is beneath the enter password space. In other software, this result is rendered in text. strength of your password.

How do Password Strength Checkers Work?

Using a Password Strength Checker is straightforward and user-friendly. Here's a step-by-step guide on how to use one effectively, along with examples of input and feedback and how to interpret the results.

Step-by-Step Guide

  1. Access the Password Strength Checker: Open the password strength checker tool on a website, application, or browser extension.

  2. Enter the Password: Type your password into the designated input field. As you type, the tool will begin analyzing the password in real-time.

  3. Receive Feedback: Observe the immediate feedback provided by the checker. This typically includes a visual strength indicator (e.g., a color-coded bar) and textual feedback.

  4. Improve Your Password: Based on the feedback, make necessary changes to your password to enhance its strength. Follow the suggestions provided by the tool, such as adding more characters, including a mix of character types, or avoiding common patterns.

  5. Finalize Your Password: Once your password reaches an acceptable strength level, indicated by a strong rating, finalize and use it for your account.

Examples of Input and Feedback

Example 1: Weak Password

Input: "password123"


  • Visual Indicator: Red bar indicating "Weak"

  • Textual Feedback: "Your password is too common and predictable. Try adding more characters and using a mix of uppercase letters, numbers, and special characters."

  • Suggestions: "Consider using a passphrase or a combination of unrelated words."

Example 2: Medium Strength Password

Input: "Passw0rd!"


  • Visual Indicator: Yellow bar indicating "Medium"

  • Textual Feedback: "Your password is better but still needs improvement. Try increasing the length and adding more variety."

  • Suggestions: "Add more special characters and avoid common patterns."

Example 3: Strong Password

Input: "J$7x!oPq4u#R9eY"


  • Visual Indicator: Green bar indicating "Strong"

  • Textual Feedback: "Your password is strong and secure."

  • Suggestions: "Remember to use a different password for each of your accounts."

The Results

  1. Strength Rating: Understand the strength rating given by the tool (e.g., Weak, Medium, Strong). A higher rating means the password is more secure.

  2. Visual Indicator: The color-coded bar or meter provides an at-a-glance indication of password strength. Red usually indicates a weak password, yellow indicates medium strength, and green indicates a strong password.

  3. Textual Feedback: Read the textual feedback carefully to understand why your password received its rating. This feedback will highlight specific weaknesses, such as lack of length, insufficient character variety, or common patterns.

  4. Suggestions for Improvement: Follow the provided suggestions to improve your password. These might include:

  • Increasing Length: Add more characters to make your password longer.

  • Adding Complexity: Use a mix of uppercase and lowercase letters, numbers, and special characters.

  • Avoiding Common Patterns: Steer clear of predictable sequences or repeated characters.

Re-evaluate: After making changes based on the feedback, re-enter the modified password to see if the strength has improved. Repeat this process until you achieve a strong rating.

By following this guide, you can effectively use a Password Strength Checker to create robust and secure passwords, thereby enhancing the security of your online accounts.

Some High-end Password Strenght Checker Testing Software

Our most preferred password testing algorithms are;

Now, we are going to see what these password testing software are all about.

1.) NordPass:


NordPass is a password manager developed by the creators of NordVPN, designed to securely store, manage, and generate passwords. It offers a range of features aimed at enhancing online security for both individuals and businesses.


  1. Password Storage: Unlimited storage for passwords, secure notes, credit card information, and personal data.

  2. Password Generator: Generates strong, complex passwords up to 60 characters, with customization options.

  3. Autofill: Automatically fills in login credentials on websites and apps.

  4. Password Health Monitoring: Analyzes stored passwords for strength and alerts users to weak or reused passwords.

  5. Data Breach Scanner: Notifies users if their stored credentials are found in data breaches.

  6. Browser Extensions: Available for popular browsers, enabling seamless autofill and password saving.

  7. Cross-Platform Compatibility: Synchronizes across multiple devices, including desktop and mobile platforms.

  8. Encryption: Uses XChaCha20 encryption, a secure alternative to AES-256, ensuring data security.

  9. Import/Export: Supports importing passwords from other managers via CSV files and manual entry.


  • User-Friendly Interface: Simple and intuitive design, making it accessible for beginners.

  • Affordable Pricing: Competitive pricing for individual and family plans.

  • Strong Security: Zero-knowledge architecture and advanced encryption.

  • Password Health Reports: Helps maintain strong password hygiene.

  • Cross-Platform Sync: Synchronizes passwords across multiple devices seamlessly.


  • Limited Free Version: The free version is restricted to one device.

  • Mobile App Auto-Lock: The mobile app doesn’t lock by default and requires manual configuration for automatic locking.

  • No Monthly Payments: Premium plans do not offer monthly payment options, only yearly subscriptions.

NordPass is a robust and user-friendly password manager suitable for individuals and businesses. It offers strong security features and an intuitive interface, although its free version is limited to a single device, and it lacks monthly subscription options. With its advanced encryption and comprehensive password health tools, NordPass is a reliable choice for enhancing your online security.

For more detailed reviews, you can check sources like TechRepublic, Cloudwards, and PasswordHero​ 

Pass 1

The Kaspersky Password Checker is an online tool provided by Kaspersky, a well-known cybersecurity company, to help users evaluate the strength of their passwords. Here's a quick overview of its features and functionality:


Password Strength Evaluation:

  • Length: Assesses the length of the password.

  • Complexity: Checks the mix of uppercase and lowercase letters, numbers, and special characters.

  • Common Patterns: Identifies common patterns or sequences that might weaken the password.

Feedback and Suggestions:

  • Provides immediate feedback on the strength of the password.

  • Offers suggestions for making the password stronger, such as increasing length or adding more character types.

Security Insights:

  • Estimates the time it would take for a password to be cracked by an attacker using various methods.

  • Advises on best practices for creating strong passwords.

Privacy and Security:

  • Ensures that the entered passwords are not stored or transmitted, maintaining user privacy and security.


  • User-Friendly: Simple and intuitive interface that is easy to use.

  • Instant Feedback: Provides real-time assessment and suggestions for improvement.

  • Trusted Source: Developed by Kaspersky, a reputable name in cybersecurity.


  • Limited Features: Primarily focuses on password strength evaluation without offering additional password management features.

  • No Storage Option: Does not provide password storage or management capabilities.

The Kaspersky Password Checker is a handy tool for quickly assessing the strength of your passwords and receiving suggestions for improvement. While it does not offer storage or advanced password management features, its focus on security and privacy makes it a reliable choice for evaluating password robustness.

Strength Checker for your password

Comparitech is a comprehensive review and comparison site that covers a wide range of tech products and services, with a focus on cybersecurity, privacy tools, and software solutions. Here are the key features, pros, and cons of Comparitech:


  1. In-Depth Reviews: Comparitech offers detailed reviews of various products, including VPNs, antivirus software, password managers, and identity theft protection services.

  2. Comparisons: The site provides side-by-side comparisons to help users choose the best products based on their needs.

  3. Guides and Tutorials: Comprehensive guides and how-to articles help users understand and utilize different tech products effectively.

  4. Discounts and Deals: Comparitech often features special deals and discounts for the products they review.

  5. News and Updates: Regular updates on the latest developments in cybersecurity and privacy tools.


  1. Expert Analysis: Reviews are conducted by experts with deep knowledge of cybersecurity and tech products.

  2. User-Friendly: The site is easy to navigate, with well-organized sections and clear, concise information.

  3. Comprehensive Coverage: Covers a wide range of products and services, making it a one-stop resource for tech-related decisions.

  4. Helpful Comparisons: Side-by-side comparisons help users make informed choices quickly and easily.

  5. Timely Updates: Regular updates ensure that the information provided is current and relevant.


  1. Potential Bias: As with any review site, there can be concerns about bias, especially if the site benefits from affiliate links.

  2. Overwhelming Amount of Information: The extensive content can be overwhelming for users looking for quick answers.

  3. Limited Niche Coverage: While comprehensive, the site may not cover some niche or lesser-known products in depth.

Comparitech is a valuable resource for anyone looking to make informed decisions about tech products, particularly in the cybersecurity and privacy space. By providing detailed reviews, comparisons, and up-to-date information, it helps users navigate the complex world of technology.

4.) Psono


Psono is an open source password manager that offers a built-in password strength checker, helping users create and store strong, secure passwords. With this tool, users can easily assess the strength of their passwords, ensuring they meet high-security standards. Psono’s password strength checker provides real-time feedback, making it easy to improve weak passwords immediately. The intuitive interface guides users through the process of creating robust passwords, enhancing overall security. By integrating a reliable password strength checker, Psono helps users maintain high levels of password security effortlessly.

Here’s a detailed look at its features, pros, and cons:


  1. End-to-End Encryption: Psono uses client-side encryption with modern cryptographic principles like Curve25519 and Salsa20, ensuring data is encrypted before it leaves your device.

  2. Password Syncing: Allows synchronization across multiple devices.

  3. Two-Factor Authentication: Supports two-factor authentication for enhanced security.

  4. Password Generator: Generates strong, random passwords.

  5. Secure Notes and File Sharing: Allows storage of secure notes and sharing files or links securely.

  6. Autofill: Browser extensions for Chrome and Firefox provide autofill capabilities.

  7. Import/Export Passwords: Supports importing and exporting passwords using CSV, JSON, or XML files.

  8. Open Source: Psono’s code is open-source, allowing for third-party audits and transparency.

  9. Self-Hosting Option: Users can opt to host their own Psono server, avoiding reliance on public services.


  1. High Security: Utilizes advanced cryptographic methods for robust security.

  2. Flexibility: Can be self-hosted, providing full control over data.

  3. Feature-Rich: Offers a wide range of features, including two-factor authentication, secure file sharing, and password generation.

  4. Cross-Platform: Available on multiple platforms with synchronization capabilities.

  5. Open Source: Transparency and potential for community-driven improvements and audits.


  1. Complex Setup: The initial setup can be daunting for beginners due to the lack of detailed onboarding instructions.

  2. Limited Browser Support: Autofill features are only available for Chrome and Firefox.

  3. Email Requirement: Requires an email address for registration, which might be a privacy concern for some users.

  4. Customer Support: Mixed reviews on customer support responsiveness.

Psono stands out with its high-security measures and flexibility, particularly appealing to tech-savvy users who might prefer to self-host their password manager. However, the complexity of its setup and limited browser support could be drawbacks for less experienced users​

Components of Password Strength

Creating a strong password involves understanding and incorporating several key components. Here are the essential elements that contribute to password strength:

  1. Length: Longer passwords are more secure. Aim for at least 12 characters.

  2. Use of Uppercase and Lowercase Letters: Mix uppercase and lowercase letters to increase complexity.

  3. Inclusion of Numbers and Special Characters: Add numbers and special characters to further enhance security.

  4. Avoiding Common Passwords and Patterns: Steer clear of predictable sequences and common passwords.


The length of a password is a critical factor in its strength. Longer passwords are more difficult for attackers to crack because the number of possible combinations increases exponentially with each additional character. Aim for a password that is at least 12 characters long. Many security experts suggest even longer passwords, especially for sensitive accounts.

Use of Uppercase and Lowercase Letters

Mixing uppercase and lowercase letters enhances password complexity. This variation increases the number of possible character combinations, making the password more resistant to brute force attacks. Use a combination of uppercase and lowercase letters throughout your password. Avoid using simple patterns like capitalizing the first letter and leaving the rest lowercase.

Inclusion of Numbers and Special Characters

Adding numbers (0-9) and special characters (e.g., !, @, #, $, %, ^, &, *) to a password further increases its complexity and unpredictability. These characters significantly expand the set of possible combinations. Incorporate numbers and special characters into your password. Avoid predictable substitutions (e.g., replacing 'a' with '@' or 'o' with '0') as these are commonly used and may be anticipated by attackers.

Avoiding Common Passwords and Patterns

Common passwords and predictable patterns (e.g., "123456", "password", "qwerty") are highly vulnerable to dictionary attacks. These passwords are widely known and easily guessable. Avoid using easily guessable passwords and patterns. Create unique passwords that do not include common words, sequences, or repeated characters.

By understanding and applying these components, you can create strong, resilient passwords that provide robust protection against unauthorized access.

Bottom Line

Strong passwords are essential for safeguarding online accounts and sensitive information against unauthorized access and cyber threats. They increase security, prevent breaches, and protect personal and professional data. Password strength checkers are valuable tools that provide real-time feedback, helping users create robust passwords. These checkers offer immediate evaluation, educational insights, and convenient access through online tools, browser extensions, password managers, and custom implementations.

To maintain robust security, adopt good password practices: use long passwords (at least 12 characters), mix character types (uppercase, lowercase, numbers, special characters), avoid common passwords and patterns, utilize passphrases, and employ password managers to store and manage passwords securely. Additionally, enable multi-factor authentication (MFA) for an extra layer of protection.

By combining password strength checkers with these best practices, you can significantly reduce the risk of compromised accounts and ensure the security of your sensitive information.


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