JavaScript minify

This tool allows you to minify and compress your JavaScript code, it removes all extra white spaces, newlines, comments, useless code and optimizes variable names.

Copy and paste, drag and drop a JS file or directly type in the "Your JavaScript code" editor below.

You can see the user guide to help you to use this JavaScript minifier.

Your JavaScript code

Minified JavaScript

User guide

Fill "Your JavaScript code" editor with your JavaScript source code. You have several possibilities:

  • Copy and paste your JavaScript code
  • Drag and drop your JavaScript file
  • Directly type in the "Your JavaScript code" editor

Click on "Export minified JavaScript" button in order to download minified JavaScript.

Click on "Copy minified JavaScript" button in order to copy minified code to clipboard.

Why minify JavaScript ?

Minification is the process of removing all unnecessary characters in order to reduce or compress JavaScript code, in order to decrease the JavaScript file size. It removes the spacing, indentation, newlines, and comments. The minification can also rename local variables, the longer variable names will be shortened. Minification makes more difficult to read JavaScript source code.


"Pretty" Source code:
		/* Load date from URL */
		function loadFromURL()
			var url = document.getElementById('url').value;
			services.http.get(url, function (data) {
				if (currentEditor && data)
				dialogLoadFromURL.dialog( "close" );		

Source code after minification process:
function loadFromURL(){var e=document.getElementById("url").value;services.http.get(e,function(e){currentEditor&&e&¤tEditor.setValue(e),dialogLoadFromURL.dialog("close")})}

Developers maintain a pretty version of their source code, and for deployment they use a minification program.

JavaScript minifier is a SEO tool which can help boost your site speed (It is a SEO factor). The compression of the web pages by the web servers limits the interest of the minification of the sources.

JavaScript minification tools

This tool allows to minify js online and also compress javascript online. Your source code will be reduce, and will load faster by browsers.

It use the UglifyJS 3 library. This library is advised by google!

This webpage allows you to use uglifyjs online. But for a professional project, this process of minification must be automated and scripted.

You can report a bug or give feedback by adding a comment (below) or by clicking "Contact us" link (at the top right hand corner of the page).


The tools are provided "as is", without warranty of any kind, either express or implied.