This little application will help you for the minification of CSS files. All you have to do is to drop the files one by one on the page, you can edit the content of the files if you want by clicking on their names and begin the minification by clicking "Compress". This app uses HTML5 elements, pure javascript and an offline manifest so you can use it even when you are disconnected from Internet. I hope this will be useful to some of you !! ;)