JavaScript Minifier/Beautifier – Free Online JS Compressor and Formatter

JavaScript Minifier/Beautifier Pro

Optimize your JavaScript code with advanced minification and beautification tools

JavaScript Code Processing

Enter JavaScript Code

/* 
 * Example JavaScript Code
 * This demonstrates various JS features
 */

// Function to calculate factorial
function calculateFactorial(n) {
    // Base case: factorial of 0 or 1 is 1
    if (n === 0 || n === 1) {
        return 1;
    }
    
    // Recursive case: n! = n * (n-1)!
    return n * calculateFactorial(n – 1);
}

// Function to check if a number is prime
function isPrime(num) {
    // Numbers less than 2 are not prime
    if (num < 2) {
        return false;
    }
    
    // Check for divisors from 2 to sqrt(num)
    for (let i = 2; i <= Math.sqrt(num); i++) {
        if (num % i === 0) {
            return false;
        }
    }
    
    return true;
}

// Class for managing user data
class UserManager {
    constructor() {
        this.users = [];
    }
    
    // Add a new user
    addUser(name, email, age) {
        const user = {
            id: this.users.length + 1,
            name: name,
            email: email,
            age: age,
            createdAt: new Date()
        };
        
        this.users.push(user);
        return user;
    }
    
    // Find user by ID
    getUserById(id) {
        return this.users.find(user => user.id === id);
    }
    
    // Get all users
    getAllUsers() {
        return this.users;
    }
    
    // Remove user by ID
    removeUser(id) {
        const index = this.users.findIndex(user => user.id === id);
        if (index !== -1) {
            return this.users.splice(index, 1)[0];
        }
        return null;
    }
}

// Create an instance of UserManager
const userManager = new UserManager();

// Add some sample users
userManager.addUser(“John Doe”, “john@example.com”, 30);
userManager.addUser(“Jane Smith”, “jane@example.com”, 25);
userManager.addUser(“Bob Johnson”, “bob@example.com”, 35);

// Function to display all users
function displayUsers() {
    console.log(“All Users:”);
    userManager.getAllUsers().forEach(user => {
        console.log(`ID: ${user.id}, Name: ${user.name}, Email: ${user.email}, Age: ${user.age}`);
    });
}

// Call the display function
displayUsers();

// Export the UserManager class (for Node.js)
if (typeof module !== ‘undefined’ && module.exports) {
    module.exports = UserManager;
}

0 characters

Processing Options

Remove Comments

Shorten Variables

Optimize Code

Preserve Function Names

Best Practices:

Minify JavaScript for production to reduce file size and improve loading times
Beautify JavaScript for development to improve readability and maintainability
Always keep a backup of your original JS file before minifying
Use consistent indentation (2 or 4 spaces) when beautifying code
Remove unused variables and functions to further optimize file size

Processed JavaScript

Your processed JavaScript will appear here

Use the buttons on the left to minify or beautify your code

Advanced JS Optimization

Lightning Fast Processing

Our optimized algorithms process even large JavaScript files in milliseconds, not seconds, with zero quality loss in the final output.

Maximum Compression

Remove all unnecessary whitespace, comments, and redundant code to achieve the smallest possible file size without affecting functionality.

Premium Formatting

Transform minified or messy JavaScript into beautifully formatted, readable code with consistent indentation and proper structure.

Code Integrity

We preserve all JavaScript functionality and logic while optimizing the code structure, ensuring your scripts work exactly as intended.

H1: JavaScript Minifier/Beautifier – Optimize and Format Your JS Code Online

Our JavaScript Minifier/Beautifier is a free, fast, and easy-to-use tool that helps developers minify JavaScript code for performance or beautify it for readability. Whether you need to compress your JS for faster website loading or format messy code for debugging, this all-in-one online solution is here for you.

What is a JavaScript Minifier?

A JavaScript minifier is a tool that removes unnecessary characters (like spaces, line breaks, and comments) from JavaScript code without changing its functionality. This makes the file smaller, allowing browsers to load and run scripts faster.

Benefits of Minifying JavaScript:

Reduces file size
Speeds up website loading
Saves bandwidth
Improves SEO by enhancing site performance

What is a JavaScript Beautifier?

A JavaScript beautifier (or formatter) takes minified, compressed, or messy JS code and formats it with proper indentation, spacing, and line breaks to make it more readable and easier to debug.

Benefits of Beautifying JavaScript:

Improves code readability
Helps with debugging and troubleshooting
Makes collaboration easier for development teams

Why Use an Online JavaScript Minifier/Beautifier?

Our online JavaScript Minifier/Beautifier combines both functionalities into one tool so you don’t have to switch between multiple apps.

Key Advantages:

Works directly in your browser
No installation required
100% free to use
Supports large JavaScript files
Works instantly without delays

How to Minify JavaScript Online

Paste your JavaScript code into the input box.
Click the Minify button.
Copy the optimized output code.

How to Beautify JavaScript Online

Paste your JS code into the editor.
Click the Beautify button.
Get properly formatted, readable code.

Best Practices for Minifying JavaScript

Always keep a backup of your original code.
Test after minifying to ensure everything works.
Use version control (like Git) to manage code changes.

When to Beautify JavaScript

When reviewing third-party libraries
When debugging production code
When collaborating with other developers

Performance Impact of Minifying JavaScript

Even small savings in file size can make a big difference in load times, especially for mobile users with slower connections. Minifying your JS is a key step in Google PageSpeed Insights optimization.

Security and Privacy

Your code is processed instantly in your browser — no data is stored on our servers, ensuring complete privacy.

Features of Our JavaScript Minifier/Beautifier

Dual Functionality – Minify and beautify in one place
Instant Output – No waiting time
No Limits – Process unlimited code length
Mobile-Friendly – Works on all devices
Developer Friendly – Supports modern JavaScript syntax

FAQs – JavaScript Minifier/Beautifier

Q1: Is this JavaScript minifier free to use?
Yes, it’s completely free with no hidden charges.

Q2: Does minifying JavaScript change how it works?
No, minification only removes unnecessary characters without altering functionality.

Q3: Can I beautify minified JS?
Yes, the beautifier restores proper formatting for better readability.

Q4: Is there a file size limit?
No, you can process JavaScript files of any size.

Q5: Does this tool support ES6+ JavaScript?
Yes, it supports modern JavaScript syntax and features.

Q6: Is my code stored or shared?
No, all processing happens locally in your browser for maximum privacy.