| .d | D Programming Language Source Code Format |
| .d00 | Adlib/Edlib Sound Format |
| .d01 | MicroSim PCBoard NC Drill Data Format |
| .d02 | MicroSim PCBoard NC Drill Data |
| .d03 | MicroSim PCBoard NC Drill Data |
| .d05 | MicroSim PCBoard NC Drill Data |
| .d07 | MicroSim PCBoard NC Drill Data |
| .d08 | DeductionPro 2008 |
| .d1 | Progress Database |
| .d10 | IRIG 106 Recording Directory |
| .d11 | Macro Mania Data |
| .d2 | Progress Database |
| .d2a | Avisynth MPAsource Plugin Scan |
| .d2ct | Disinfectant For Mac |
| .d2h | Diablo II Hack It Module |
| .d2i | ATMA Diablo II |
| .d2p | Diablo 2 Packet |
| .d2s | Diablo II Saved Map Seed Data Format |
| .d2v | DVD2AVI Format |
| .d2x | Diablo 2 Stash |
| .d32 | Lotus Visualisation |
| .d3c | Descent |
| .d3d | Corel Dream 3D Drawing Format |
| .d3dbsp | Call Of Duty Modern Warfare 2 Map Format |
| .d3m | Descent Game |
| .d3s | Nikon Image Format |
| .d3v | Datel Video Format |
| .d3x | Nikon Image Format |
| .d4 | Dataphor Source |
| .d43 | IAR Debug |
| .d5p | Dragon UnPACKer Language Pack |
| .d64 | Commodore Emulator Format |
| .d67 | VICE Disk Image |
| .d71 | Commodore Emulator |
| .d80 | Commodore CBM-8050 Diskette Emulator Image |
| .d81 | Commodore VC-1581 Diskette Emulator Image |
| .d82 | Commodore Emulator |
| .d88 | Toshiba Pasopia 7 Disk Format |
| .da | DAwin Project |
| .da$ | Microsoft Compressed DAT |
| .da0 | Microsoft Windows 9x Registry Backup Format |
| .da1 | Windows Registry Backup |
| .da2 | DeepAnalysis 2 EBay Auction Data |
| .da3 | Star Trek Generations Saved Game |
| .da4 | SeeYou Waypoint |
| .da5 | Star Trek Generations Saved Game |
| .da6 | Star Trek Generations Saved Game |
| .da7 | Star Trek Generations Saved Game |
| .da8 | Star Trek: Generations Saved Game |
| .da9 | Star Trek Generations Autosave Game |
| .daa | PowerISO Direct-Access-Archive Format |
| .daap | Apple DAAP Playlist |
| .dab | OrangeCD Catalog Database |
| .dabriefcase | RemObjects Data Abstract File Briefcase |
| .dac | Dynacom Accounting Data |
| .daconfig | RemObjects Data Abstract Configuration Format |
| .daconnections | RemObjects Data Abstract Connections Format |
| .dacpac | Database Deployment Format |
| .dad | RemObjects Data Abstract Driver Format |
| .dad2 | Canvas For Mac |
| .dadiagrams | RemObjects Data Abstract Data Diagrams Format |
| .dadx | Eclipse Document Access Definition Extension |
| .dae | Collada 3D Digital Asset Format |
| .daemonscript | Daemon Tools Script |
| .daf | Digital Anchor Data Format |
| .dag | Dagra Document |
| .dah | AutoPlay Media Studio Splash Image |
| .dai | Dream Aquarium Patch |
| .dal | DVD-lab Project Format |
| .dam | DeltaMaster Analysis Model Format |
| .dan | D-MAS Analysis System Patient |
| .dao | Disk At Once CD/DVD Image Format |
| .dap | Download Accelerator Partial Download Format |
| .dapf | DinkeyAdd Parameter |
| .daproj | DivX Author Project |
| .daq | Data Acquisition Toolbox |
| .dar | DAR Disk Archive |
| .dart | Apple Mac OS X DiskImageMounter DART Image |
| .dartclip | Dartfish Metadata |
| .das | DeltaMaster Analysis Session Format |
| .daschema | Data Abstract Database Schema Format |
| .dash | Dashlane Profile |
| .dat | Program Data Format |
| .dat-shm | EmClient Data |
| .dat2 | XYplorer Thumbnail Cache |
| .data | Analysis Studio Offline Data Format |
| .datacontract | Web Service Software Factory Installer |
| .datasource | Microsoft Visual Studio Data Source |
| .datbak0 | Miranda Data File Backup |
| .dat_mcr | Minecraft Backup Format |
| .dat_new | Minecraft Level Format |
| .dat_old | Minecraft Backup Format |
| .dat_tureg_old | Windows Registry |
| .dau | Express Dictate Dictate Record |
| .dav | Mace DVR-1600HP Video Format |
| .dawg | Eliot Dictionary |
| .dax | Compressed CD Image Format |
| .day | Day Of The Zombie Map Format |
| .DayZProfile | DAYZ Profile |
| .daz | DAZ Studio Format |
| .dazip | Dragon Age Origins Game Format |
| .da_ | GKSetup Support |
| .db | Database Format |
| .db$ | DBASE Temporary |
| .db- | Norton Nprotect Database Format |
| .db-journal | SQLite Database Journal |
| .db-shm | Google Android SQLite Temporary Database Format |
| .db-wal | Google Android SQLite Temporary Database Format |
| .db0 | S.T.A.L.K.E.R. Game |
| .db1 | S.T.A.L.K.E.R. Game Format |
| .db2 | DBASE II Database Format |
| .db2ind | Microsoft Visual Studio DB2 Index |
| .db2mov | DeepDVD Movie Authoring Project |
| .db2p | IBM Database Project |
| .db2sp | Microsoft Visual Studio DB2 Create Procedure Statement |
| .db2tbl | Microsoft Visual Studio DB2 Table Script |
| .db2tr | Microsoft Visual Studio DB2 Trigger Script |
| .db2udf | Microsoft Visual Studio DB2 User Defined Function |
| .db2vw | Microsoft Visual Studio DB2 View Script |
| .db3 | Database Format |
| .db3-journal | SQLite Temporary Database Journal |
| .db4 | Paychex Payroll Database |
| .db5 | S.T.A.L.K.E.R. Game |
| .db6 | S.T.A.L.K.E.R. Game |
| .db7 | S.T.A.L.K.E.R. Game |
| .db8 | S.T.A.L.K.E.R. Game |
| .db9 | S.T.A.L.K.E.R. Game |
| .dba | Palm Desktop For Windows Format |
| .dbag | WinSQL DataBag |
| .dbat | Quicken For Mac Data |
| .dbb | Skype User Data Format |
| .dbc | OrCAD Capture CIS Database Configuration Format |
| .dbd | DemoShield Project Format |
| .dbf | Common Database Format |
| .dbg | Debug Format |
| .dbgsym | Debug Symbols Format |
| .dbh | CodeWarrior Debug Preferences |
| .dbheader | Download Boost Header |
| .dbi | FIFA World Cup Game Data Comin Fe |
| .dbk | OrCAD Schematic Capture Backup Format |
| .dbl | DAZ Brick Light Format |
| .dblib | Altium Designer Database Library |
| .dblink | Altium Designer Database Link |
| .dbm | Adobe ColdFusion Template Format |
| .dbmanifest | Database Manifest |
| .dbmc | Netscape Cache Log |
| .dbmdl | Microsoft Visual Studio Database Project |
| .dbmg | Netscale Navigator History |
| .dbml | Microsoft Visual Studio Object Relational OR Designer Format |
| .dbnw | Netscape News |
| .dbnx | Netscape For Mac Host |
| .dbo | DarkBASIC Source Code Format |
| .dbp | Microsoft Visual Studio Visual C++ Database Project |
| .dbpf | Maxis Database Packed Format |
| .dbpro | DarkBASIC Project Format |
| .dbproj | Microsoft Visual Studio Visual C++ Database Project Format |
| .dbq | Paradox Memo Format |
| .dbr | DeepBurner Burn List Format |
| .dbs | SQL Structured Query Language Database Command Format |
| .dbschema | Database Schema |
| .dbt | Database Text Memo Format |
| .dbv | Database Variable Field |
| .dbw | Microsoft Windows Database |
| .dbx | Microsoft Outlook Express E-mail Folder Format |
| .dbz | DB Zipper Compressed Database |
| .dc | DesignCAD CAD Format |
| .dc0 | OpenBSD |
| .dc1 | Bloomba E-mail Message Format |
| .dc2 | Kodak DC25 Digital Camera Format |
| .dc3 | Medicine Image Format Format |
| .dc4 | ViaThinkSoft (De)Coder Format |
| .dc42 | Apple Disk Copy 4.2 Disk Image |
| .dc5 | DataCAD Drawing Format |
| .dc6 | Diablo 2 Static Image |
| .dca | DisplayWrite Document |
| .dcb | Concordance Database Control Block Format |
| .dcc | Diablo 2 Animation |
| .dcd | DesignCAD Drawing Format |
| .dcdc | Astound Presentation |
| .dce | Drivecam Video File Format |
| .dcf | DRM Content Format Delivery Format |
| .dcg | HSFX Map |
| .dck | Resolume Deck Format |
| .dcl | DumpSec Format |
| .dcls | CATIA V4 Settings |
| .dcm | Dicom Medicine Image File Format |
| .dcmd | DiskCatalogMaker Catalog Database Format |
| .dcmf | DiskCatalogMaker Catalog |
| .dcn | Autodesk Depth Slope Definition |
| .dco | DisCryptor Encrypted Archive |
| .dcover | BeLight Disc Cover Format |
| .dcp | Delphi Component Package Format |
| .dcpf | Roxio Disc Copier Project Format |
| .dcpil | Delphi Compiler Symbolic Information |
| .dcpr | Adobe Photoshop DNG Digital Negative Camera Profile Recipe Format |
| .dcproj | Dashcode Project |
| .dcpy | Disk Copy |
| .dcr | Kodak Digital Camera Raw Image Format |
| .dcs | QuarkXPress Desktop Color Separation Format |
| .dcst | Adobe InDesign Format |
| .dct | Spell Checking Dictionary Format |
| .dct5 | Microsoft Word 5 For Mac Dictionary |
| .dctmp | DC++ Partially Downloaded Format |
| .dctx | Microsoft Office IME Open Extended Dictionary |
| .dctxc | Microsoft Office IME Open Extended Dictionary |
| .dcu | Delphi Compiled Unit Format |
| .dcuil | Delphi Compiled Unit Format |
| .dcv | DriveCrypt Encrypted Volume |
| .dcx | Microsoft Visual FoxPro Database Container (DBC) |
| .dd | Doodle C64 Image Format |
| .dd2 | Dungeon Designer 2 Map Design |
| .dd3 | Blood Bowl Game |
| .dda | TNTmips Import |
| .ddap | DiskDoubler Compressed |
| .ddat | DivX Web Player Temporary Download Format |
| .ddb | Device Dependent Bitmap Graphics Format |
| .ddc | DivX Descriptor DVD Description Format |
| .ddcx | DivX Descriptor 2 Format |
| .ddd | Adobe Distiller Format |
| .dde | Dynamic Data Exchange |
| .ddf | Diamond Directive Format |
| .ddj | Silkroad Alchemy Page |
| .ddk | IBM OS/2 Saved SKF |
| .ddl | SQL Data Definition Language Format |
| .ddm | Alpha Five Table Objects |
| .ddoc | DigiDoc Client Container |
| .ddp | Delphi Diagram Page From Compiler |
| .ddpokersave | DD Poker Save Game |
| .ddr | DDRemote Parameter |
| .ddrw | Apple ClarisDraw Draw Format |
| .dds | DirectDraw Surface Format |
| .ddsx | Stronghold Kingdoms Data |
| .ddt | Jill Of The Jungle Game Format |
| .ddx | Alpha Five Data Dictionary Index |
| .ddz | Adaptec Unix Driver |
| .de | German Language Translation |
| .deb | Debian Linux Package Format |
| .debian | Debian Related |
| .dec | VersaPro Declaration Format |
| .deck | Microsoft Office For Mac Query |
| .decrypt | Microsoft Windows 8 Decrypted ESD Format |
| .ded | Dr. Engrave Document Format |
| .dee | Creator Simulator Description |
| .def | Definition Format |
| .definition | Apple Mac OS X Automator Data Type Definition |
| .deform | FontTwister Deform Guide Line |
| .dek | Magic The Gathering Deck Format |
| .del | Apple Safari |
| .delf | Malicious Or Virus |
| .dem | Recorded Game Format |
| .demo | VirtuaGirl HD Model Demo |
| .demo4 | UT2004 Demo |
| .deny | Linux Access |
| .dep | Microsoft Visual Basic Setup Wizard Dependency Format |
| .depend | Code::Blocks Project Support Format |
| .deploymentoptions | SQL Server Deployment Options |
| .deploymenttargets | SQL Server Deployment Target |
| .deproj | Disketch Project Format |
| .der | DER Encoded Internet Security Certificate Format |
| .des | CorelDRAW Corel Designer Technical Illustration Format |
| .des-se | Sony Ericsson XPERIA X10 |
| .desc | Description Format |
| .description | Multilizer PDF Translator Description |
| .design | Microsoft Expression Design Drawing Format |
| .desklink | Desktop Shortcut |
| .deskthemepack | Microsoft Windows 8 Theme Pack Format |
| .desktop | DesktopX Windows Desktop Theme Format |
| .dess | Microsoft Device Emulator Saved State |
| .det | ACT! Format |
| .deu | Adobe Reader German Language |
| .dev | Windows Device Driver Format |
| .developerprofile | Apple Xcode Developer Profile Format |
| .develve | Develve Format |
| .deviceids | Apple IOS Device Identification Format |
| .deviceinfo | Apple IPhone Configuration Utility Format |
| .devicemanifest-ms | Microsoft Windows Device Metadata |
| .devicemetadata-ms | Microsoft Windows 7 Device Metadata Package |
| .devicesalt | Nook Encrypted Format |
| .devpak | Dev-C++ Developer Package |
| .devx | E-sword Devotional |
| .dewf | SoundCap, SoundEdit Recorded Instrument |
| .dex | Google Android Compiled Executable Format |
| .dexe | Microsoft Virtual PC For Mac Executable |
| .dez | DeZign For Databases Project |
| .df | Corel Paradox Table Filter |
| .df1 | Omnis7 And Omnis Studio Database File Format |
| .df10 | IRIG 106 Recording Directory |
| .df2 | Omnis7 And Omnis Studio Database File Format |
| .df3 | Omnis7 And Omnis Studio Database |
| .df4 | Omnis7 And Omnis Studio Database |
| .df6 | Omnis7 And Omnis Studio Database |
| .df7 | Omnis Studio Database |
| .dfb | Data Flask Formula |
| .dfc | Defractor Instrument Format |
| .dfe | RISC OS Comma Separated Value |
| .dff | RenderWare Model Format |
| .dfg | Data Flask Grid Format |
| .dfh | SONAR Kit |
| .dfk | Dark Flow Project Format |
| .dfl | OLE2 Doc |
| .dfm | Delphi Win32 Form Format |
| .dfn | Delphi Definition |
| .dfont | Mac OS X Data Fork Suitcase Format |
| .dfp | Eyeon Fusion Plugin Format |
| .dfproj | DVD Flick Project Format |
| .dfq | SmartWare Query Definition |
| .dfr | SmartWare Report Definition |
| .dfs | AutoCAD Utility Defaults Format Format |
| .dft | Solid Edge Drawing Format |
| .dfu | Apple IOS Firmware Update Format |
| .dfv | MS Office Word Print Format Template |
| .dfw | SmartWare Cross-tab Definition |
| .dfx | Drafix CAD Format |
| .dfxp | Timed Text Markup Language |
| .dg | Source Code For A Dialog Box |
| .dg-key | DigiGuide Key |
| .dg3 | DeltaGraph |
| .dgb | FlashCAD Drawing Database Format |
| .dgc | TurboTax Tax Form Format |
| .dgdat | DoubleGIS Database |
| .dgf | GPS Pathfinder Office Geoid Grid |
| .dgi | HDConvertToX Input |
| .dgk | Delcam PowerMILL Format |
| .dgl | DigiGuide Language |
| .dgm | Lotus Freelance Diagram |
| .dgmaker | DigiGuide Marker |
| .dgml | Microsoft Visual Studio Directed Graph Markup Language Format |
| .dgn | MicroStation Design Format |
| .dgnlib | MicroStation Design Library |
| .dgpd | DeltaGraph Document |
| .dgprint | DigiGuide Print Template |
| .dgr | DeltaGraph Document |
| .dgrh | DeltaGraph For Mac |
| .dgs | TES Dagesh Pro Document Format |
| .dgsl | Microsoft Visual Studio Visual Shader Graph Format |
| .dgt | Digital Gallery Format |
| .dgx | IBM Rational XDE |
| .dgz | Dega Saved State |
| .dhcd | DHCD Computing Format |
| .dhe | Microsoft Help Workshop Dialog Box Help Editor Document |
| .dhf | AMIGA Emulator Disk Image ROM |
| .dhs | HyperSnap Drawing |
| .dht | GAUSS Data Set Header Format |
| .dhtml | Dynamic HTML Format |
| .dhw | ACECAD Digimemo Memo |
| .dhy | Adobe Bridge |
| .di | D Programming Language Source Code |
| .dia | DIA Drawing Format |
| .diagcab | Microsoft Windows Troubleshooting CAB Format |
| .diagcfg | Microsoft Windows Troubleshooting Configuration Format |
| .diagpkg | Microsoft Windows Troubleshooting Package Format |
| .dib | Device-Independent Bitmap Graphic |
| .dic | Dictionary Format |
| .dicm | Medicine Image |
| .dicom | Dicom Medicine Image File Format |
| .dicproof | Microsoft Office Dictionary Proofing Format |
| .dict | Sunnysoft InterWrite |
| .did | Adobe Distiller/Bridge |
| .die | Diablo Item |
| .dif | Digital Interface Format |
| .diff | Diff Source |
| .dig | Audio Format |
| .dii | CT Summation Document Image Information Load Format |
| .dil | Delphi |
| .dim | Direct Internet Message Encapsulation DIME Format |
| .dimax | DiMAX Firmware Format |
| .dime | Direct Internet Message Encapsulation Format |
| .dimg | Mac Disk Image |
| .din | DataEase Installation Script |
| .dinerdash2savedgame | Diner Dash 2 Saved Game |
| .dinerdashsavedgame | Diner Dash Saved Game |
| .dinfo | DivX Web Player Temporary Download Format |
| .dip | Windows Bitmap Format |
| .dir | Adobe (Macromedia) Director Format |
| .dir00 | Disk Defrag Error Or Dump |
| .directory | KDE Folder View Properties Format |
| .dis | Oracle Discoverer Workbook Format |
| .disabled | Spybot - Search & Destroy Disabled Format |
| .disc | Toast Document |
| .disco | DISCO Discovery Document |
| .discomap | Microsoft DISCO Discovery Output Format |
| .disk | Linux Virtual Hard Disk Format |
| .diskcopy42 | Apple Disk Copy 4.2 Disk Image |
| .diskdefines | Linux LiveCD Information Format |
| .dist | Apple Mac OS X Installer Distribution Format |
| .dist-rdb | SAM Scoring |
| .distz | Apple Mac OS X Installer Distribution |
| .dit | Microsoft Windows 2000 Active Directory Schema Format |
| .dita | DITA Output Format |
| .ditamap | DITAmap Format |
| .ditaval | DITA Conditions Format |
| .div | DivX Movie |
| .diva | Project DIVA Song Format |
| .divx | DivX Media Format |
| .dix | DIVA-GIS Export Format |
| .diy | My Drivers Backup Format |
| .diz | Description In ZIP Format |
| .dj | DJGPP Docs |
| .dja | DunDjinni |
| .djanimations | Digital Juice Animation |
| .djf | NTI Drive Backup |
| .djg | DJGPP Compiler Makefile |
| .djm | Dynojet Map Format |
| .djprojects | Digital Juice Compressed |
| .djr | Ringtone Media Studio Ringtone Format |
| .djs | NASCAR Thunder 2004 Game Music |
| .djv | DjVu Image Format |
| .djvu | DjVu Image Format |
| .djx | Dundjinni Art |
| .dk@p | DocMaker Standalone Document |
| .dkb | DKBTrace Raytraced Graphics |
| .dkd | Submarine Titans Battle Map |
| .dke | DriveLock FDE Disk Key Format |
| .dklang | DKLang Translation Editor Translation |
| .dkt | DiGiTIAL THUNDER Drum Kit Format |
| .dkz | ZIP Description Text |
| .dl | Zoo Tycoon 2 Game Format |
| .dl0 | Abbyy Finereader 4.0 Sprint |
| .dlb | Troj/Dloadr-AHT |
| .dlc | JDownloader Download Link Container |
| .dlct | AppleScript Dialect |
| .dld | EdLog Compiled Program |
| .dle | 3D Studio Max Plugin |
| .dlf | DataCAD Double Precision Layer |
| .dlg | Digital Line Graph Vector Image Format |
| .dli | Win32.Sober.AD@mm |
| .dlk | Xprotect License Code List |
| .dll | Dynamic Link Library Format |
| .dll1 | ASUS ExpressGate (Splashtop) |
| .dlls | UFO: Alien Invasion Plugin |
| .dllx | Backdoor.Bot |
| .dll_non_opt | Adobe |
| .dll_resp | Microsoft Windows Live Messenger Contact Related |
| .dlm | Akamai Download Manager Format |
| .dlo | 3D Studio Max Plugin Format |
| .dlp | DirectMusic Producer DLS |
| .dlpf | DinkeyLook Diagnostic Information |
| .dls | DownLoadable Sound Format |
| .dlu | 3D Studio Max Utility Plug-in Format |
| .dlv | CATIA Export Format |
| .dlv4 | Catia |
| .dlx | Sony VDU File Format Importer |
| .dlz | Crossword Power Tools Crossword Library |
| .dl_ | Microsoft Windows DLL Backup Format |
| .dm | Paradox Data Model Format |
| .dm1 | ER/Studio Database Model Format |
| .dm2 | Quake II Recorded Game Format |
| .dm3 | Gatan Digital Micrograph Format |
| .dmb | BYOND Byte-code Format |
| .dmc | Datamartist Data Canvas Format |
| .dmd | Oracle SQL Developer Data Modeler Data Format |
| .dmf | Delusion/Xtracker Audio Format |
| .DMFr | Download Master Incomplete Download |
| .dmg | Apple Mac OS X Disk Image Format |
| .dmgpart | Apple Mac OS X UDIF Split Disk Image Format |
| .dmi | DreamMaker Format |
| .dmkit | Drumaxx |
| .dml | DynaScript Markup Language Format |
| .dmm | DropMind Mind Map Format |
| .dmms | DropMind Map Style |
| .dmmx | DropMind XML Map Bundle Format |
| .dmn | SAS Metadata |
| .dmo | Demo Format |
| .dmp | Memory Dump, Screen Dump, Junk Files |
| .dmpatch | Fruity Loops Studio |
| .dmpr | Direct Mail Project Format |
| .dmptrn | Fruity Loops Studio Pattern |
| .dmr | BrainVoyager QX Project Format |
| .dms | Disk Masher Image |
| .dmsa | Roxio Music Disc Creator Project Format |
| .dmsd | Roxio Creator MyDVD DVD Project Format |
| .dmsd3d | Roxio MyDVD 3D Project |
| .dmse | Roxio Sound Editor Project Format |
| .dmsk | DivX Web Player Temporary Download Format |
| .dmsm | Roxio Creator VideoWave Movie Project Format |
| .dmsm3d | VideoWave 3D Movie Project Format |
| .dmsp | Roxio PhotoSuite Project Format |
| .dmss | Roxio Creator VideoWave Slideshow Project Format |
| .dmt | Delphi Menu Template Format |
| .dmtemplate | Direct Mail E-mail Template Format |
| .dmu | DigitalMugician Audio |
| .dmv | Adobe Acrobat Catalog |
| .dmx | Source Filmmaker Project Format |
| .dmx-info | DriverMax Driver Information Format |
| .dmy | SEMIA LTST DB Time Series Data |
| .dm_1 | Call Of Duty Demo |
| .dm_57 | Return To Castle Wolfenstein Demo |
| .dm_68 | Quake 3 Arena Demo Format |
| .dm_82 | Wolfenstein Enemy Territory Demo Format |
| .dm_83 | Wolfenstein Enemy Territory Demo Format |
| .dm_84 | Wolfenstein Enemy Territory Demo Format |
| .dn1 | Duke Nukem Episode 1 Game Format |
| .dn2 | Duke Nukem Episode 2 Game Format |
| .dn3 | Duke Nukem Episode 3 Game Format |
| .dna | CA Backup And Migration Backup Format |
| .dnc | Microsoft Windows XP Dancers Dancer Database Format |
| .dnd | ClustalW2 Tree |
| .dne | Netica Bayesian Network Text Format |
| .dnf | Duke Nukem Forever Map Format |
| .dng | Adobe Digital Negative Format |
| .dnh | Touhou Danmakufu Game Script Format |
| .dni | RealMyst 3D Game Archive |
| .dnl | DNAML EBook Format |
| .dnn | DotNetNuke Manifest |
| .dnp | DRM Digital Rights Management |
| .dns | DynSite Plug-in File |
| .dnt | RSNetWorx Project |
| .dnx | IBM Rational Software |
| .do | Java Servlet Format |
| .do2 | Resident Evil 2 Door |
| .do7 | DOS 7 |
| .dob | Microsoft Visual Basic User Document Form Format |
| .doc | Microsoft Word 97 To 2003 Document Format |
| .doc# | Microsoft Word 97 To 2003 Document Format |
| .docc | DragThing Color Settings |
| .docenx | Egis Encrypted Word DOC |
| .dochtml | Microsoft Word HTML Document Format |
| .dock | DragThing Dock |
| .docklet | ObjectDock Docklet |
| .dockzip | Stardock ObjectDock Format |
| .docm | Microsoft Word 2007/2010 Open XML Macro-enabled Document Format |
| .docmhtml | Microsoft Word MIME HTML Document Format |
| .docset | Doxygen Source Code Documentation Format |
| .docstates | Microsoft Visual Studio Document Tab Well |
| .docx | Microsoft Word 2007/2010 Open XML Document Format |
| .docxenx | Egis Encrypted Word DOCX |
| .docxml | Microsoft Word XML Document |
| .docz | ThinkFree Online Note Document |
| .doe | Rockwell Arena Model |
| .dof | DOSBox Capture Movie |
| .doh | Geoworks GEOS Dependency Information |
| .doi | BiRT Data Object Instance |
| .dok | ASCII Text |
| .dol | Nintendo GameCube Executable Format |
| .dolphinview | Dolphin For KDE Folder View Settings Format |
| .don | OpenOffice.org Log |
| .done | Cygwin Post-install |
| .donotpresent | Apple Mac OS X Time Machine Resource Fork |
| .doo | Atari Doodle Image |
| .dop | Digital Orchestrator Pro |
| .dor | Digita Organiser |
| .dos | WIN95/ DOS 7 System |
| .DoST | DoStudio Subtitle Format |
| .dot | Microsoft Word 97 To 2003 Document Template Format |
| .dothtml | Microsoft Word HTML Document Template Format |
| .dotm | Microsoft Word 2007/ 2010 Open XML Macro-enabled Document Template Format |
| .dotmenx | Egis Encrypted Word DOTM |
| .dotx | Microsoft Word 2007 Or Word 2010 XML Document Template Format |
| .dotxenx | Egis Encrypted Word DOTX |
| .dov | Temporary Format |
| .download | Chrome Partial Download Format |
| .downloaded | ICQ 6 Hash |
| .downloadhost | MSN Explorer Download View |
| .downloading | Pando Incomplete Download Format |
| .dox | MultiMate Document Format |
| .doxy | Doxygen |
| .dp | Text |
| .dp1 | DataPower Database Format |
| .dpa | Serif DrawPlus Animation Format |
| .dpb | DataPilot Database Format |
| .dpc | Microsoft Office Resource |
| .dpcache | Apple IPhoto Cache |
| .dpd | Ovation Pro Document |
| .dpe | DPwinEHE Project |
| .dpf | F-Secure Default Policy Format |
| .dpg | NDs-mPeG Video Format |
| .dpi | Adlib Express Document Processing Information Settings |
| .dpj | Borland Delphi Project |
| .dpk | Delphi Package Source Format |
| .dpkw | Delphi Package Source Format |
| .dpl | Delphi Packed Library Format |
| .dplt | AppleScript Droplet |
| .dpm | Pro Tools Plugin Format |
| .dpn | Depiction Format |
| .dpo | DECAdry Express Business Cards Business Card |
| .dpp | Serif DrawPlus Drawing Format |
| .dpq | Clarion |
| .dpr | Delphi Project Format |
| .dprj | VideoReDo TVSuite DVD Project |
| .dpro | MacDraw Pro |
| .dproj | Delphi Project Format |
| .dps | DivX Player Skin |
| .dpt | Kingsoft Presentation Template |
| .dpv | Siemens NX Drafting Standard Format |
| .dpx | Digital Moving Picture Exchange Bitmap Format |
| .dqa | Daqarta Extended WAV Data |
| .dql | DataEase Database |
| .dqy | Microsoft Excel ODBC Query Format |
| .dr | OMA Open Mobile Alliance DRM Rights Object Format |
| .dr3 | V-Control Import Driver |
| .dr3d | CorelDream 3D Graphics |
| .dr4 | AllyCAD Drawing |
| .dr8 | DR-008 Drumkit |
| .dra | OrCAD PCB Drawing Format |
| .draw | Acorn Vector Draw |
| .drawing | Artboard Drawing Format |
| .drawit | DrawIt Drawing |
| .drb | Dr. Beam |
| .drc | OMA Open Mobile Alliance DRM Rights Object Format |
| .drd | Allen & Heath PL Designer Document |
| .dre | DReport Exported Report |
| .dream | DreamMaker Animated Wallpaper Format |
| .dreamchroniclessavedgame | Dream Chronicles Saved Game |
| .dres | Delphi Compiled Resource Format |
| .drf | 3D Studio Max Scene Format |
| .drg | AllyCAD CAD Design Drawing Format |
| .dri | Microsoft SQL Server Replication |
| .drl | Gerber Drill Rack Format |
| .drm | Cubase Drum Map Setup Format |
| .drmmeta | Adobe HTTP Dynamic Streaming DRM Additional Header |
| .drmx | Drumlin Fully Secured PDF Document Format |
| .drmz | Drumlin Secured PDF Format |
| .dro | DOSBox Raw OPL Format |
| .dropbox | Dropbox |
| .drpf | DinkeyRemote Parameter |
| .drpm | Delta RPM Format |
| .drr | Altium Designer Drill Report |
| .drs | Corel WordPerfect Driver Resource |
| .drscan | Data Rescue Scans Format |
| .drt | PSpice Or PCB Designer Custom Derating |
| .dru | EAGLE Design Rules |
| .drv | Microsoft Windows Device Driver |
| .drw | Vector Drawing Format |
| .drw2 | Canvas 3.5 Drawing |
| .drw5 | Canvas 5 Drawing |
| .drwdot | SolidWorks Drawing Template Format |
| .drwprp | SolidWorks Drawing Custom Properties Tab Template |
| .drwr | Drop Drawers Drawer |
| .drx | Adobe Photoshop Tutorial |
| .drz | DReport Compressed Report Format |
| .ds | Microsoft SQL Server Data Source Format |
| .ds1 | Diablo 2 Map |
| .ds2 | Olympus Digital Speech Standard Format |
| .ds2res | Dungeon Siege 2 Data |
| .ds4 | Micrografx Designer Graphic |
| .dsa | DAZ Studio 3+ Script |
| .dsb | Rayman 2 Play Format |
| .dsc | Debian Source Control Format |
| .dsd | Autodesk AutoCAD Drawing Set Description Format |
| .dsdb | ANSYS CFX Simulation Database |
| .dse | DAZ Studio Encrypted Script |
| .dsf | DAZ Studio DSF Format Format 3D Format |
| .dsft | Microsoft Application Virtualization Differential SFT |
| .dsg | Control Studio Document Format |
| .dsgm | DS Game Maker Project |
| .dsh | Dashboard PDA Wallpaper |
| .dsi | DAZ Studio Layered Image Set |
| .dsim | Digital Simulator |
| .dsjt= | Adobe Director For Resources |
| .dsk | Disk Image Format |
| .dskin | DockX Skin Format |
| .dsl | Damaged Sector List |
| .dslsetup | Domain Specific Language Setup |
| .dsm | Digital Sound Module Format |
| .dsml | Directory Services Markup Language (DSML) Identity Feed |
| .dsn | Microsoft Database Source Name And Settings Format |
| .dso | Microsoft Visual Studio Workspace Format |
| .dsp | Microsoft Developer Studio Project Format |
| .dsprototype | Microsoft Visual Studio Prototype |
| .dsq | Corel Query Language |
| .dsr | Micrografx Designer Graphic |
| .dss | Olympus DSS Voice Format |
| .dsslideshow | Desktop Sidebar Slideshow Panel |
| .dst | Tajima Embroidery Format |
| .dstl | Acrobat Distiller |
| .dstudio | DownloadStudio Incomplete Download Format |
| .dsu | ProWORX Nxt Data Setup |
| .dsv | DeSmuME Saved Game Format |
| .dsw | Microsoft Visual Studio Workspace Format |
| .dsx | Diet Studio XML Format |
| .dsy | AJC Directory Synchronizer Project Format |
| .dsym | ArchiCAD For MAC Geometric Description Language Format |
| .dsz | Orchida (OES) Embroidery Format |
| .ds_store | Macintosh OS X Folder Information Format |
| .dt | Macintosh Format Data Fork |
| .dt0 | DTED Digital Terrain Elevation Data Level 0 Format |
| .dt1 | DTED Digital Terrain Elevation Data Level 1 Format |
| .dt2 | Microsoft Live Messenger Avatar Format |
| .dt4 | BioSonics Data |
| .dt? | LoseThos Data |
| .dta | Program Data Format |
| .dtapart | DownThemAll Download Part Format |
| .dtb | DataCAD Custom Toolbar |
| .dtb2 | Timbuku Pro DropIn |
| .dtc | Microsoft Windows Application Log |
| .dtd | Document Type Definition Format |
| .dtermlicence | DTerm Licence |
| .dtf | ACDSee Thumbnail Database Format |
| .dtg | Desktop Guitar Score |
| .dth | Microsoft Windows Application Log |
| .dti | Fifa 2001 Data |
| .dtj | Microsoft Windows Application Log |
| .dtl | The Sims |
| .dtm | Audio Module |
| .dtml | Zope Document Template Markup Language |
| .dtn | TunnelCAD Import Or Export |
| .dto | Directory Toolkit Output |
| .dtp | Page Express Desktop Publishing Document |
| .dtproj | SQL Integration Services Project |
| .dtr | DATroniC Data Recording |
| .dts | Digital Surround Audio File Format |
| .dtsconfig | Microsoft SQL Server Integration Services Configuration |
| .dtshd | DTS-HD Master Audio Format |
| .dtsx | DTS Settings Format |
| .dtt | IBM AS/400 Data Transfer |
| .dtv | DVD2AVI Mpeg2 |
| .dtw | My Better Desktop Wallpaper Format |
| .dtx | Documented LaTeX Source Format |
| .dt_ | Apple Macintosh Data Fork Format |
| .dua | FIFA 2001 Data Feart Legalscr |
| .dub | Tuningwrench Audio Utility Compressed |
| .duc | Action Replay Max DS Save Format |
| .ducf | DinkeyChange Update Code |
| .duck | Cyberduck Bookmark Format |
| .dumodule | Apple Mac OS X Disk Utility Plugin Module |
| .dump | Google BreakPad Crash Log Format |
| .dun | Dial-Up Network Config Format |
| .duo | Microsoft Access |
| .dup | Windows DUA Polling Reconfiguration |
| .dup0 | Samsung Kies Duplicate Media |
| .dup1 | Samsung Kies Duplicate Media |
| .dup2 | Samsung Kies Duplicate Media |
| .dus | Readiris Font Dictionary Format |
| .dv | Digital Video Format |
| .dv-avi | Microsoft DV-AVI Video Format |
| .dv2 | Divine Divinity 2 Game Format |
| .dv4 | Bosch Security Systems CCTV Video Format |
| .dvb | DVBLine Document |
| .dvc | Dragon NaturallySpeaking Voice Command Format |
| .dvd | Elby CloneDVD Image |
| .dvddata | TMPGEnc DVD Author Video |
| .dvdfab6 | DVDFab Key |
| .dvdfabhddecrypter | DVDFab HD Decrypter |
| .dvdmedia | RipIt DVD Backup Format |
| .dvdproj | Apple IDVD Project Format |
| .dvdr | DVD Master Image Format |
| .dvdrip-info | Dvd::rip Technical Information |
| .dvds | DVDStyler Project Format |
| .dvf | Sony DV Voice Format |
| .dvg | GraphicsWorks Vector Drawing Format |
| .dvi | TeX Text Document (TeX Device Independent File Format) |
| .dvl | Dalim Virtual Library Format |
| .dvp | AutoCAD Device Parameter |
| .dvr | Microsoft Windows XP Media Center Recorded Television Format |
| .dvr-ms | Microsoft Digital Video Recording Format |
| .dvs | Enterprise Vault DVS |
| .dvsd | DVMaster Pro Video |
| .dvt | DepoView Digital Video Transcript |
| .dvtplugin | Apple Xcode DVT Extension |
| .dvx | DivX Movie |
| .dvz | Documents To Go Data |
| .dw | DavidWhittaker Audio Format |
| .dw1 | DeathWatch WebCrawler |
| .dw2 | DesignCAD Drawing Format |
| .dw3 | DeathWatch WebCrawler |
| .dwa | Digital Waveform Archiver Audio Format |
| .dwb | VariCAD Drawing |
| .dwc | Emulex DWC Firmware Update File Format |
| .dwd | DiamondWare Digitized Format |
| .dwdoc | DrawWell Document Format |
| .dwe | Creator Simulator Pattern |
| .dwf | Autodesk Design Web Format |
| .dwfx | Autodesk Design Web Format |
| .dwg | AutoCAD Drawing Format |
| .dwh | WaterGems Drawing |
| .dwi | Dance With Intensity Format |
| .dwk | DADiSP Worksheet |
| .dwl | AutoCAD Drawing Database Format Locking Information Format |
| .dwl2 | AutoCAD Drawing Lock |
| .dwlibrary | Mariner Paperless Document Library Format |
| .dwm | Digital Works Circuit Project |
| .dwn | CISCO Download Format |
| .dwo | Red Hat Linux DWARF Debugging Information |
| .dwp | DarkWave Studio Project Format |
| .dwproj | DataWindow Designer Project |
| .dws | AutoCAD Standardization Format |
| .dwt | Adobe Dreamweaver Template Format |
| .dwx | DesignWorks Viewer Tools |
| .dwz | Compressed AutoCAD Drawing Format |
| .dx | DEC WPS/DX Text Format |
| .dx2 | Oracle Siebel |
| .dx7 | Yamaha DX-series Raw Audio Data |
| .dxb | AutoCAD Drawing Exchange Format |
| .dxe | AutoCAD Data Extraction Template Format |
| .dxf | AutoCAD DXF Drawing Exchange Format |
| .dxg | Duxbury Braille Translator |
| .dxi | PayWindow Database |
| .dxl | Domino XML Format |
| .dxls | DashXL Skin Set Format |
| .dxml | V++ Graphics Image |
| .dxp | CDBurnerXP Data Compilation Format |
| .dxpack | DesktopX Object |
| .dxr | Adobe Director Protected Movie Format |
| .dxs | Deus Ex Saved Game Format |
| .dxstream | DX Studio Stream |
| .dxstudio | DX Studio Document |
| .dxt | LucasArts The Secret Of Monkey Island: Special Edition Texture |
| .dxt1 | S2TC Compressed Surface |
| .dxt5 | S2TC Compressed Surface File (texture) |
| .dxtheme | DesktopX Windows Desktop Theme |
| .dxtorylic | Dxtory Licence |
| .dxv | DocXchanger |
| .dxx | AutoCAD Drawing Interchange Attribute Format |
| .dxz | Trojan Backdoor Virus |
| .dyc | Xerox Printer Driver Configuration Format |
| .dylib | Xcode Dynamic Library Format |
| .dyn | Lotus 1-2-3 |
| .dyv | WORM_AUTORUN.DYV Worm |
| .dyz | Backdoor.Win32.ProRat.dyz Trojan |
| .dz | Dzip Format |
| .dzi | PhotoSynth Deep Zoom Image |
| .dzip | The Witcher 2 Game Archive |
| .dzl | DazzlerMAX |
| .dzm | Cyberlink DirectorZone Menu Template Format |
| .dzp | DirectorZone Particle Effect Format |
| .dzs | Download Accelerator Skin |
| .dzt | Cyberlink DirectorZone Title Template Format |
ファイル拡張子は通常、ユーザーには表示されません。これを変更するには、コントロールパネルをクリックし、次にデスクトップのカスタマイズから[フォルダオプション]]を選択します。そこから表示を選択し、"既知のファイル形式の拡張子を隠す"という項目を見つけます。その選択肢のチェックを外し、[OK]をクリックして確定させます。
