File extensions beginning with the letter D. Commonly used extensions are listed in bold.

	D  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z .d D Source Code File (more info) .d00 OPL2 FM Audio File (more info) .d01 OPL2 FM Audio File (more info) .d2v DVD2AVI File (more info) .d3v Datel Video File (more info) .d64 Commodore 64 Disk Image (more info) .d88 Toshiba Pasopia 7 Disk File (more info) .da0 Windows Registry Backup File (more info) .daa PowerISO Direct-Access-Archive (more info) .dae Digital Asset Exchange File (more info) .daf Digital Anchor File (more info) .dal DVD-lab Project File (more info) .dal Download Accelerator Plus URL List (more info) .dam DeltaMaster Analysis Model (more info) .dao Disk at Once CD/DVD Image (more info) .dap Download Accelerator Plus Partial Download (more info) .dap Access Data Access Page (more info) .dar DAR Disk Archive (more info) .das DeltaMaster Analysis Session (more info) .dat Data File (more info) .dat VCD Video File (more info) .dat Exchange E-mail Attachment (more info) .dav DVR365 Video File (more info) .dax PSP Compressed ISO Disc Image (more info) .db Database File (more info) .db Windows Thumbnail Cache (more info) .db X-Ray Engine Database (more info) .db2 dBASE II Database (more info) .dbb Skype User Information File (more info) .dbc FoxPro Database (more info) .dbd DemoShield Project (more info) .dbf FoxPro Table (more info) .dbf Database File (more info) .dbg FoxPro Debugger Configuration (more info) .dbk dBASE Database Backup (more info) .dbm ColdFusion Server File (more info) .dbo DarkBASIC Object (more info) .dbt Database Text File (more info) .dbv Database Variable Field (more info) .dbx Visual FoxPro Table (more info) .dbx Outlook Express E-mail Folder (more info) .dc DesignCAD Design File (more info) .dc1 Bloomba E-mail Message (more info) .dc4 ViaThinkSoft (De)Coder 4 File (more info) .dcd DesignCAD Drawing (more info) .dcd DisCryptor Encrypted Database (more info) .dce DriveCam Video (more info) .dcf Disk Copy Fast Disk Image File (more info) .dcf DisCryptor Encrypted Archive (more info) .dcf DRM Content Format File (more info) .dcf Document Computation Format (more info) .dcl DumpSec Report File (more info) .dcm DICOM Image File (more info) .dcm DiskCatalogMaker Catalog File (more info) .dcm DCM Audio Module (more info) .dcmd DiskCatalogMaker Thumbnail-Enabled Catalog (more info) .dco DisCryptor Encrypted Virtual Disk Archive (more info) .dcp Delphi Compiled Package (more info) .dcr Kodak RAW Image File (more info) .dcr Shockwave Media File (more info) .dcs Desktop Color Separation File (more info) .dct FoxPro Database Memo (more info) .dct Dictionary File (more info) .dct Dictation Audio File (more info) .dctmp DC++ Partially Downloaded File (more info) .dcu Delphi Compiled Unit (more info) .dcx FoxPro Database Index (more info) .dcx FAXserve Fax Document (more info) .dd DiskDouber Archive (more info) .ddb Device Dependent Bitmap (more info) .ddc DivX Descriptor File (more info) .ddcx DivX Descriptor 2 File (more info) .ddrw ClarisDraw Drawing (more info) .dds DirectDraw Surface (more info) .deb Debian Software Package (more info) .dec Declaration File (more info) .def SmartWare II Data File (more info) .def Module-Definition File (more info) .dek Eavesdropper Batch File (more info) .dek Memorize-It Flashcard Deck (more info) .dem Digital Elevation Model (more info) .dem Video Game Demo (more info) .des Corel Designer File (more info) .des QuickBooks Forms Template (more info) .des Pro/DESKTOP CAD File (more info) .design Microsoft Expression Design Drawing (more info) .desklink Desktop Shortcut (more info) .desktop Desktop Entry File (more info) .dev Dev-C++ Project File (more info) .dev Windows Device Driver File (more info) .dewf SoundEdit Recorded Instrument (more info) .dex Dalvik Executable File (more info) .dex Excel Spreadsheet (more info) .dex DEXIS Digital X-ray File (more info) .df1 Omnis Native Datafile (more info) .df2 Defractor 2 Instrument (more info) .dfc Defractor Instrument (more info) .dff RenderWare Model File (more info) .dfm Midas ViewPoint Display Form (more info) .dfm Delphi Form (more info) .dfont Mac OS X Data Fork Font (more info) .dfp Fusion Plugin File (more info) .dfproj DVD Flick Project (more info) .dft Solid Edge Draft Document (more info) .dfx Drafix CAD File (more info) .dgb FlashCAD Drawing Database (more info) .dgc DGCA File Archive (more info) .dgc TurboTax Tax Form (more info) .dgn MicroStation Design File (more info) .dgs Dagesh Pro Document (more info) .dhtml Dynamic HTML file (more info) .dib Device Independent Bitmap File (more info) .dic Dictionary File (more info) .dif Digital Interface Format (more info) .dif Data Interchange Format (more info) .dig Sound Designer Audio File (more info) .dig Digilink Audio File (more info) .dii Summation Batch Load File (more info) .dim DIME File (more info) .dime Direct Internet Message Encapsulation File (more info) .dir Adobe Director Movie (more info) .directory KDE Folder View Properties File (more info) .disco DISCO Discovery Document (more info) .discomap DISCO Discovery Output File (more info) .disk Linux Virtual Hard Disk (more info) .diskdefines Linux LiveCD Information File (more info) .dist Mac OS X Distribution Script (more info) .divx DivX-Encoded Movie File (more info) .diz Description in Zip File (more info) .djvu DjVu Image (more info) .dlc Download Link Container File (more info) .dld EdLog Compiled Program (more info) .dlg Digital Line Graph (more info) .dll Dynamic Link Library (more info) .dll DLL Dynamic Web Page (more info) .dlm Akamai Download Manager File (more info) .dlo 3ds Max Plug-in (more info) .dls Downloadable Sounds File (more info) .dm DRM Delivery Message (more info) .dm2 Toad Data Modeler 2 File (more info) .dm2 Quake 2 Demo File (more info) .dmb Digital Multimedia Broadcasting File (more info) .dmc Medical Manager Script (more info) .dmf Delusion Digital Music File (more info) .dmg Mac OS X Disk Image (more info) .dmo Movienizer Database File (more info) .dmo Derive Demo (more info) .dmp Windows Memory Dump (more info) .dms Disk Masher Image (more info) .dms Dream Maker Script (more info) .dm_82 Wolfenstein 1.00 Demo Movie File (more info) .dm_83 Wolfenstein 1.02 Demo Movie File (more info) .dm_84 Wolfenstein 2.06 Demo Movie File (more info) .dne Netica Text File (more info) .dng Digital Negative Image File (more info) .do Java Servlet (more info) .dob Visual Basic UserDocument (more info) .doc Microsoft Word Document (more info) .doc WordPad Document (more info) .dockzip ObjectDock File (more info) .docm Word 2007 Macro-Enabled Document (more info) .docx Microsoft Word Open XML Document (more info) .dol Gamecube Executable File (more info) .dolphinview Dolphin Folder View Settings File (more info) .dot Microsoft Word Template (more info) .dotm Word 2007 Macro-Enabled Document Template (more info) .dotx Word 2007 Document Template (more info) .dov Temp File (more info) .download Partially Downloaded File (more info) .downloadhost MSN Download Settings File (more info) .dox Visual Basic Binary UserDocument (more info) .dp1 DataPower Database File (more info) .dpb FaxMaster Document (more info) .dpd Ovation Pro File (more info) .dpg Nintendo DS Movie File (more info) .dpk Delphi Package (more info) .dpl Delphi Package Library (more info) .dpm Pro Tools Plugin File (more info) .dpn Depiction Data File (more info) .dpp DrawPlus Drawing File (more info) .dpr Delphi Project (more info) .dpr Digital InterPlot File (more info) .dpx Digital Picture Exchange File (more info) .dqy Excel Query File (more info) .dr DRM Rights Object (more info) .drc DRM Rights Object (more info) .drl Gerber Drill Rack File (more info) .drm Cubase Drum Map File (more info) .drv Device Driver (more info) .drw Drawing File (more info) .drw DESIGNER Drawing (more info) .drwdot SolidWorks Drawing Template (more info) .ds TWAIN Data Source (more info) .dsb Orchida Embroidery File (more info) .dsc CoolPix Disk Identification File (more info) .dsd Diet Studio Data File (more info) .dsf Delusion Digital Sound File (more info) .dsk Simple IDs Database (more info) .dsk Disk Image (more info) .dsk Borland Project Desktop File (more info) .dskin DockX Skin (more info) .dsm Digital Sound Module (more info) .dsp Developer Studio Project (more info) .dsp Dynamic Studio Professional Module (more info) .dss DCC Active Designer File (more info) .dss Digital Speech Standard File (more info) .dst Embroidery Format (more info) .dstudio DownloadStudio Incomplete Download (more info) .dsw Visual C++ Workspace File (more info) .dsy Directory Synchronizer Project File (more info) .dsy Besta Video File (more info) .dsym Xcode Debug Symbols File (more info) .dsz Orchida (OES) Embroidery File (more info) .ds_store Mac OS X Folder Settings File (more info) .dtd Document Type Definition (more info) .dtm DigiTrakker Module (more info) .dtp Publish-iT Document (more info) .dtr DATroniC Data Recording (more info) .dts DTS Encoded Audio File (more info) .dtw Desktop Wallpaper (more info) .dt_ Macintosh Data Fork (more info) .dus Readiris Font Dictionary (more info) .dv Digital Video File (more info) .dvd DOS Device Driver (more info) .dvd CloneCD DVD Information File (more info) .dvdproj iDVD Project File (more info) .dvf Sony Digital Voice File (more info) .dvi Device Independent Format File (more info) .dvl Virtual Library File (more info) .dvr-ms Microsoft Digital Video Recording (more info) .dvx DivX Video File (more info) .dwc Emulex DWC Firmware Update File (more info) .DWD DiamondWare Digital Audio File (more info) .dwf Design Web Format File (more info) .dwfx Design Web Format XPS File (more info) .dwg AutoCAD Drawing Database File (more info) .dwi Dance With Intensity Song File (more info) .dwn Firmware Update File (more info) .dwt Dreamweaver Web Page Template (more info) .dx DEC WPS Plus File (more info) .dxb Drawing Exchange Binary (more info) .dxf Drawing Exchange Format File (more info) .dxr Protected Macromedia Director Movie (more info) .dxs Deus Ex Saved Game (more info) .dylib Mach-O Dynamic Library (more info)

All File Extensions | "D" Computer Terms

Looking for a file extension that isn't listed here? Send in your suggestion!

Other Help Center Resources:

Computer Questions and Answers | List of Domain Suffixes