Canva is a free graphic design tool website that allows users to easily create visual designs using drag and drop interfaces. It contains millions of images, fonts, icons, shapes and photo filters that users can incorporate into designs. Key features include image cropping, adding text to photos, photo effects and transparent images. Users can sign up with Facebook or Google and then create designs like Twitter headers or other projects by choosing a template and dragging and dropping elements. Designs can then be saved or shared.