Picmaker is an online application that allows you to create design elements without relying on a desktop application. The application is template-based, similar to Canva -- the best-known competitor in the field. While less known, Picmaker allows for more flexibility and creativity than most of its competition. The free version will store your images in the cloud and offers a wide range of design functions such as text effects. To create a YouTube video thumbnail using Picmaker, log in to your account. If you don't have a Picmaker account, create a new one. For the purpose of creating a YouTube thumbnail, the free version should cover most people's needs.