This app does extractly what it named. You throw in a mess up, non-formatted CSS, choose a format you want and click "Do the magic" button. It will return you a proccessed CSS in your selected format. Fast and Simple. The utility right now support 4 different CSS formats. You could do it online or download the windows app for this. It's also include the source code for the solution (Core, Win App, Web App) in C# WPF an ASP.net.