Many times when the web page is loading we often see a small piece of preloading animation. Pre-loaders are great tool to let your visitors know that the content is being loaded thus reducing a chance of visitor’s abandoning your website in this short period of time. HTML & CSS can be very well used to create amazing preloaders. In this compilation, we have collected 13 Awesome CSS3 Pre-Loader Animations which you can use for your website’s or apps UI. So let’s start with the list.