NBDesigner is the best extension for a WordPress printing website with product customization. Customers do not have experience in photoshop, but they also want to create unique designs for customized T-shirts, mugs, pillows, photos, canvases, business cards, and phone cases as their demands. It is straightforward if your site is integrated with WordPress Online Product designer.
Info: https://cmsmart.net/wordpress-plugins/woocommerce-online-product-designer-plugin