40 File Extensions starting with D
| .DAO | DAO Disk Image |
| .DAT | Data File |
| .DAT | VCD Video |
| .DAT | SPOT Image |
| .DBF | dBASE Database |
| .DCM | Dicom Image |
| .DCR | Raw Image File |
| .DCX | Multipage PCX Image |
| .DCX | Zsoft Multi-page Paintbrush Image |
| .DCX | Zsoft Publisher's Paintbrush Image |
| .DD | Doodle C64 Image |
| .DDS | Microsoft DirectDraw Surface |
| .DI | Raw CD Audio File |
| .DIA | Dia UML Diagram |
| .DIB | Windows Bitmap Image |
| .DIF | Data Interchange Format Document |
| .DIS | DKB Ray-Tracer Image |
| .DIVX | DivX Movie |
| .DJV | DjVu Document |
| .DJVU | DjVu Document |
| .DLL | Dynamic Link Library |
| .DMG | Mac OS X Disk Image |
| .DNG | Raw Image File |
| .DOC | Corel WordPerfect Document |
| .DOC | Microsoft Word Document |
| .DOCM | Microsoft Word XML Document |
| .DOCX | Microsoft Open XML Word Document |
| .DOO | Doodle Atari Image |
| .DOT | Microsoft Word Template |
| .DOTM | Microsoft Word XML Template |
| .DOTX | Microsoft Open XML Word Template |
| .DPX | DPX Image |
| .DRZ | Draz Paint Image |
| .DTS | Digital Theater Systems Audio File |
| .DV | Digital Video |
| .DVD | DVD Disk Image |
| .DWF | AutoCAD Drawing |
| .DWG | AutoCAD Drawing |
| .DXF | AutoCAD Drawing eXchange Format Drawing |
| .DXF | AutoCAD Drawing |