MDI is a Microsoft image format Some programs, such as Microsoft Office Document Image Writer to help format used by the virtual form for the document to print.
The problem with this format is that it is very convenient - you even with a lot of applications, edit do not open it.
MDI2PDF a tool to PDF or JPG, format, which is much more beneficial to you if you want to edit or images that are able to convert MDI files.
The basic version MDI2PDF mirror or rotating images, adjusting the screen, or the like to convert all the files in a particular folder a couple of additional options, have been included. However, its main purpose to do if you need to edit some files be converted to MDI in a manageable format, since it would be easier to just use a conventional image editor.