Password Strength Checker & Generator

Why Use a Password Strength Checker?

• Identify Weak Passwords: Quickly identify weak passwords that can be easily cracked or guessed.
• Ensure Better Security: Use the checker to create passwords that are difficult for attackers to guess.
• Avoid Common Mistakes: The checker will highlight common mistakes like using personal information or simple sequences.
• Save Time: Generate strong passwords instantly without worrying about complexity.

Why Use a Password Generator?

• Generate Random, Secure Passwords: Automatically generate passwords with high entropy that are hard to guess.
• Ensure Unique Passwords for Each Account: Generate different passwords for each of your accounts to avoid security risks.
• Customize Password Rules: Set your own rules to determine the length, complexity, and character requirements of the password.
• No Need to Remember Complex Passwords: Use a password manager to store generated passwords securely.

Using Password Strength in JavaScript

You can check the strength of passwords programmatically in JavaScript by assessing factors like length, character variety, and unpredictability. Here's an example of how you can check the strength of a password:

Checking Password Strength

function checkPasswordStrength(password) {
    let strength = 0;
    if (password.length >= 12) strength += 1;
    if (/[A-Z]/.test(password)) strength += 1;
    if (/[a-z]/.test(password)) strength += 1;
    if (/\d/.test(password)) strength += 1;
    if (/[!@#$%^&*(),.?":{}|<>]/.test(password)) strength += 1;

    if (strength === 5) {
        return 'Strong';
    } else if (strength >= 3) {
        return 'Moderate';
    } else {
        return 'Weak';
    }
}
    
console.log(checkPasswordStrength("V3rY$tr0ngP@ssw0rd!2025"));  // Output: Strong

Generate a Strong Password in JavaScript

You can easily generate a strong, random password using JavaScript. Here's an example of how you can generate a secure password programmatically:

Generating a Password

function generatePassword(length = 12) {
    const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()";
    let password = "";
    for (let i = 0; i < length; i++) {
        const randomIndex = Math.floor(Math.random() * charset.length);
        password += charset[randomIndex];
    }
    return password;
}

console.log(generatePassword(16));  // Output: Randomly generated password like "Vb7*sd2!jRmT9zD#"