File Extension MDI

File type: Microsoft Document Imaging Format

About the MDI file type:

If Windows cannot find the appropriate program associated with .MDI files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The .MDI file extension is proprietary to Microsoft and is used for storing image files in high resolution raster format. To create, view or edit MDI files you will need to use Microsoft software such as Microsoft Office.

Additional Information:
The .MDI files extension is also associated with Borland Multiple Document Interface files.