A thumbnail maker for YouTube is an application that provides ready-to-use templates as well as features such as deleting out backgrounds to make it easy to create a YouTube thumbnail quickly. Usually, these applications are part of a larger image editing or marketing software program. For example, if you’re speaking about a product, in this case, an iPhone 7 Pro, a picture of the device will immediately connect with the viewer. If you add text in a graphic highlighting one of the main features of what the video talks about, it makes the viewer more curious.