Microsoft Document Imaging to PDF conversion is the process of transforming files saved in the MDI (Microsoft Document Imaging) format — typically created by older versions of Microsoft Office Document Imaging and often containing scanned images or multi-page TIFF-like content — into the widely supported PDF format. This conversion preserves page order and visual fidelity while producing a portable, searchable, and easily shareable PDF compatible with modern viewers and printers.
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Read guide →Drag your .mdi file from your computer or use the browse function.
Confirm .pdf as the selected destination format.
Click "Convert" and download your converted .pdf file once ready.
MDI files typically use the MIME type image/vnd.ms-modi and are TIFF-based scanned images. These files are often used for scanned document archiving within Microsoft Office Document Imaging. PDF files use the MIME type application/pdf and support a variety of codecs and compression methods, making them versatile for documents containing text, images, and graphics.
The PDF (.pdf) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like Microsoft Document Imaging.
While specific technical details aren't available here, PDF files generally serve the purpose of storing image effectively within their domain.
Easily convert your Microsoft Document Imaging (MDI) files to the universally accepted PDF format using our fast and reliable online MDI to PDF converter. No software installation required, perfect for seamless document sharing and archiving.
Microsoft Document Imaging files are primarily used within legacy Microsoft Office environments and often require specific software to open. In contrast, PDF is a widely accepted format compatible with virtually all platforms and devices, making sharing and viewing documents easier and more reliable.
Keep individual MDI files under 50–100MB when possible to speed uploads; split very large multi-page scans before conversion.
Preserve original scan quality by choosing lossless or high-quality JPEG compression and setting DPI to 300 for print-ready PDFs.
For many files, use batch conversion tools to process multiple MDI files into a single or multiple PDFs; confirm page naming and order first.
Note format limitations: MDI does not natively include embedded fonts or advanced OCR metadata—OCR may be required after conversion to make text searchable.
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Start your free MDI to PDF conversion now.
Drag your file here to to upload.
Up to 250MB
If you need archival compliance, export to PDF/A and avoid lossy compression which can hinder future OCR accuracy.