Abstract: A system and method for customizing print-on-demand products is disclosed. A server system provides a user interface for rendering by an Internet-enabled application of a computing device, wherein the user interface provides an augmented reality (AR) preview screen that displays a digital representation of a customization panel of a product overlaid on a view of a real-world environment provided by a camera of the computing device. The AR preview screen enables a user to visualize customized content located in the real-world environment on the digital representation of the customization panel of the product and position the camera of the computing device to capture an image of the customized content. The server system receives the image of the customized content from the computing device, and generates a print file that causes printing of the customized content on the customization panel of the product.