| Extension | .mdi |
| Category | documents |
| Description | The MDI (Microsoft Document Imaging) format is a proprietary file format developed by Microsoft for storing images scanned or generated using the Microsoft Office Document Imaging (MODI) application. MDI files typically contain black-and-white or grayscale images of documents, such as scanned pages of text, invoices, or diagrams. They are commonly used for archiving and sharing scanned documents electronically, as they offer relatively small file sizes while preserving text clarity and image quality. MDI files can be viewed and manipulated using Microsoft Office Document Imaging or converted to other formats for wider compatibility, such as TIFF or PDF. |
| Technical details | MDI files typically use a form of lossless image compression known as Modified Huffman Coding (MH) or Group 3 Fax Encoding (G3). These compression methods reduce the file size of scanned documents without sacrificing image quality. |
