JavaScript Minifier
Developer Tools
Minify JavaScript code
How to Use
- 1. Paste or type your JavaScript code in the input field
- 2. Click "Minify JavaScript" to remove unnecessary whitespace and comments
- 3. Click "Format JavaScript" to pretty-print your code
- 4. Use the copy button to copy the result or download as a JS file
Example / Use Case
Reduce JavaScript Bundle Size
A web developer optimizes their JavaScript bundle for production. They minify the JS to reduce file size and improve page load time.
Input
JS: function sayHello() {
var message = "Hello";
console.log(message);
}Output
Minified: function sayHello(){console.log("Hello")}
Savings: ~45%How It Works
JavaScript minification removes all unnecessary characters from code without changing functionality. This includes whitespace, comments, and shortens variable names. The result is significantly smaller files that browsers can parse and execute identically to the original.
Minified JavaScript is essential for production websites. Smaller files mean faster downloads, quicker parsing, and faster execution. This improves user experience and helps with SEO through better performance scores. Most modern frameworks include minification in their build process, but online minifiers are useful for quick optimizations. For HTML and CSS minification, use the respective tools.
How to Use
- 1Paste or type your JavaScript code into the input area
- 2Click the "Minify" button
- 3View the compressed JavaScript output
- 4Copy the minified code for production use
Frequently Asked Questions
Yes, it shortens variable names to single letters or short strings to reduce size.