We will learn about how we can set icon in css with suitable example. See the comment section for link which I have used in this video.. The simplest way to add an icon to your HTML page, is with an icon library, such as Font Awesome. Add the name of the specified icon class to any inline HTML element (like i or span ). All the icons in the icon libraries below, are scalable vectors that can be customized with CSS (size, color, shadow, etc.)