PrintOnly is a Windows software tool designed to restrict document printing exclusively to physical USB printers, ensuring document security by preventing viewing or editing. Supporting a range of document formats like PDF, MS Word, Excel, images, TXT, PowerPoint, and more, PrintOnly uses a unique POF (PrintOnly File) format that can only be printed using the PrintOnlyClient client program, enhancing document security against unauthorized modifications. Additionally, PrintOnly offers features such as limiting print counts per computer, adding watermark text, and providing a portable ZIP version for easy transfer. The program supports multiple languages for user interface customization, making it a valuable asset for businesses, organizations, and individuals seeking to safeguard sensitive data and control printing processes.