PDF has become the standard format for document sharing and printing. PDF documents maintain their formatting across devices and are difficult to edit, making them ideal for official documents. PrimoPDF is a free PDF converter that offers high-quality conversion to PDF, with a user-friendly interface that enables printing to PDF from any Windows application. Key features include the ability to optimize PDF output for screen, print, e-book, and prepress, secure PDF files with 128-bit encryption, and add document information (e.g. title, author, subject, keywords) to converted PDF files. Full support for 64-bit machines, double byte character and non-TrueType font support, and improved PDF output are also available.