MDI to TIFF File Converter is a command line tool, which allows you to convert one or more MDI files to TIFF. MDI is a proprietary file format of MODI (Microsoft Office Document Imaging), which was deprecated as part of Office 2010. This conversion tool will allow you to view MDI files after they are converted to TIFF. TIFF files may be viewed using a variety of image viewing programs, such as the Windows Fax and Image Viewer.