JS minifier

Minify JavaScript online instantly with this JS minifier tool. Remove whitespace, line breaks, comments, and redundant characters to compress scripts without affecting functionality. Common long-tail use cases include minify JavaScript code online, compress JS for faster websites, and reduce JavaScript file size for SEO performance.

What is JavaScript Minification?

JavaScript minification is the process of reducing the size of JS files by eliminating unnecessary characters and optimizing code structure. This includes spaces, tabs, comments, and even shortening variable names in some cases. The minified JS runs the same as the original but loads faster in browsers.

Why use a JS Minifier?

• Faster websites: Smaller JS files mean quicker load times and improved performance scores.
• SEO advantages: Optimized scripts contribute to better Core Web Vitals and search rankings.
• Lower bandwidth usage: Minified JavaScript reduces data transfer between server and client.
• Cleaner deployment: Production-ready JS without unnecessary clutter.

How to use the JavaScript Minifier

1. Paste your JavaScript code or upload a .js file.
2. Click “Minify” to compress the script automatically.
3. Copy or download the optimized JS file for use in your project.

Who should use it?

• Web developers optimizing client-side scripts for production.
• SEO specialists improving page performance and rankings.
• Agencies & businesses ensuring fast, user-friendly websites for customers.
• Students & learners practicing best practices in front-end performance.

Best practices for JS minification

• Minify before deployment: Always serve compressed scripts on live websites.
• Keep a readable copy: Maintain the original JS code for development and debugging.
• Combine with HTML & CSS minification: For maximum optimization, compress all front-end resources.
• Test thoroughly: Ensure all functionality remains intact after minification.

Examples

Before Minification

function greet(name) {
  // Say hello
  console.log("Hello, " + name);
}
greet("Alice");

After Minification

function greet(n){console.log("Hello, "+n)}greet("Alice");

FAQ

Does minification change how the script works?

No—the minified JavaScript functions exactly the same. Only non-essential characters are removed.

Can I unminify JavaScript?

Yes—you can use a JavaScript beautifier or formatter to reformat the code, though comments and original variable names will be lost.

Does the tool support ES6+ JavaScript?

Yes—it works with modern JavaScript features, including arrow functions, async/await, and modules.