.CSD | Valve | Spilfiler | Steam Game Data Backup File | Microsoft SharePoint Server | Microsoft Corporation |
.CSH | Adobe Systems Incorporated | Ikke Almindelige Filer | Photoshop Custom Shapes File | Microsoft Notepad | Microsoft Corporation |
.CSHADER | Microsoft Corporation | Datafiler | Microsoft Visual Studio Text Data | Microsoft Visual Studio | Microsoft Corporation |
.CSHTML | Microsoft Corporation | Webfiler | ASP.Net Web Page | Microsoft Visual Studio | Microsoft Corporation |
.CSI | ContentServ | Udviklerfiler | ContentServ Include File | Microsoft SharePoint Server | Microsoft Corporation |
.CSO | Microsoft Corporation | 3D-billedfiler | Compiled Shader Object File | Microsoft Visual Studio | Microsoft Corporation |
.CSP | RadGs Software | Webfiler | Concept Server Page | Microsoft Systems Management Server | Microsoft Corporation |
.CSPROJ | Microsoft Corporation | Udviklerfiler | Visual Studio C# Project | Microsoft Visual Studio | Microsoft Corporation |
.CSR | Open Source | Webfiler | Certificate Signing Request File | Microsoft IIS | Microsoft Corporation |
.CSV | Unknown Developer | Datafiler | Comma Separated Values File | Microsoft Excel | Microsoft Corporation |
.CSX | Microsoft Corporation | Udviklerfiler | Visual C# Script | Microsoft Visual Studio | Microsoft Corporation |
.CT1 | Microsoft Corporation | Datafiler | Microsoft Systems Management Server Proposed Site Control Data | Microsoft Systems Management Server | Microsoft Corporation |
.CT3 | Microsoft Corporation | Datafiler | Microsoft Systems Management Server (SMS) Control File | Microsoft Systems Management Server | Microsoft Corporation |
.CTC | Microsoft Corporation | Udviklerfiler | Visual Studio Command Table Configuration | Microsoft Visual Studio | Microsoft Corporation |
.CTL | Open Source | Datafiler | StepMania SMZIP Package Description File | Microsoft Visual Studio | Microsoft Corporation |
.CTT | Microsoft Corporation | Datafiler | Messenger Contact List | Microsoft Notepad | Microsoft Corporation |
.CTX | Microsoft Corporation | Udviklerfiler | Visual Basic Control Binary File | Microsoft Visual Studio | Microsoft Corporation |
.CU | NVIDIA | Udviklerfiler | CUDA Source Code File | Microsoft Notepad | Microsoft Corporation |
.CUB | Microsoft Corporation | Datafiler | Analysis Services Cube File | Microsoft Excel | Microsoft Corporation |
.CUE | Unknown Developer | Disk billedfiler | Cue Sheet File | Microsoft Notepad | Microsoft Corporation |
.CUR | Unknown Developer | Systemfiler | Windows Cursor File | Microsoft Windows | Microsoft Corporation |
.CUS | Autodesk, Inc. | Indstillingsfiler | AutoCAD Custom Dictionary File | Microsoft Notepad | Microsoft Corporation |
.CV | Microsoft Corporation | Datafiler | CodeView Data File | CodeView | Microsoft Corporation |
.CV4 | Microsoft Corporation | Udviklerfiler | Microsoft CodeView Graphics Data | CodeView | Microsoft Corporation |
.CVA | Hewlett-Packard | Indstillingsfiler | HP SSM Information File | ACD Systems Canvas | Microsoft Corporation |
.CVR | Microsoft Corporation | Ikke Almindelige Filer | Microsoft Crash Report File | Microsoft Excel | Microsoft Corporation |
.CVS | Unknown Developer | Datafiler | Comma Separated Values File | Microsoft Excel | Microsoft Corporation |
.CVX | ACD Systems | Vektorbilledfiler | Canvas Drawing File | ACD Systems Canvas | Microsoft Corporation |
.CXE | Sublime HQ Pty Ltd | Udviklerfiler | Common XML Envelope Data | Microsoft Notepad | Microsoft Corporation |
.C_ | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Windows WinHelp Compressed Data | Microsoft Windows | Microsoft Corporation |
.C__ | Open Source | Udviklerfiler | C++ Source Code File | Microsoft Visual Studio | Microsoft Corporation |
.D3D | YoYo Games | 3D-billedfiler | Game Maker 3D File | Microsoft DirectX | Microsoft Corporation |
.DA2 | Microsoft Corporation | Videofiler | Windows Dancer File | Windows Media Center | Microsoft Corporation |
.DAP | SpeedBit | Ikke Almindelige Filer | Download Accelerator Plus Partial Download | Microsoft Access | Microsoft Corporation |
.DAT | Unknown Developer | Spilfiler | Game Data | Internet Explorer | Microsoft Corporation |
.DATA | Appricon | Datafiler | Analysis Studio Offline Data | Microsoft Excel | Microsoft Corporation |
.DATASOURCE | Microsoft Corporation | Ikke Almindelige Filer | Microsoft Visual Studio Data Source | Microsoft Visual Studio | Microsoft Corporation |
.DAVMOUNT | Microsoft Corporation | Systemfiler | Windows Based Script Host | Microsoft Windows | Microsoft Corporation |
.DB | Dwayne Richard Hipp | Databasefiler | Mobile Device Database File | Microsoft Excel | Microsoft Corporation |
.DB-JOURNAL | Sublime HQ Pty Ltd | Databasefiler | SQLite Rollback Journal File | Microsoft Notepad | Microsoft Corporation |
.DBA | PDC (Prolog Development Center) | Databasefiler | Turbo Prolog Database | Microsoft Notepad | Microsoft Corporation |
.DBC | Microsoft Corporation | Databasefiler | FoxPro Database File | Microsoft Visual FoxPro | Microsoft Corporation |
.DBE | Microsoft Corporation | Sikkerhedskopifiler | ActiveSync Backup File Format | Microsoft ActiveSync | Microsoft Corporation |
.DBF | dBase, LLC | Databasefiler | Database File | Microsoft Excel | Microsoft Corporation |
.DBG | Microsoft Corporation | Indstillingsfiler | Visual FoxPro Debugger Configuration File | Microsoft Visual FoxPro | Microsoft Corporation |
.DBL | Microsoft Corporation | Systemfiler | Microsoft Windows XP Product Activation Data | Windows XP | Microsoft Corporation |
.DBM | Adobe Systems Incorporated | Webfiler | ColdFusion Server File | Internet Explorer | Microsoft Corporation |
.DBML | Microsoft Corporation | Udviklerfiler | Visual Studio OR Design File | Microsoft Visual Studio | Microsoft Corporation |
.DBP | Microsoft Corporation | Udviklerfiler | Microsoft Visual Studio Visual C++ Database Project | Microsoft Notepad | Microsoft Corporation |
.DBT | Abacus Data Systems | Datafiler | AbacusLaw Data File | Microsoft Visual FoxPro | Microsoft Corporation |
.DBX | Microsoft Corporation | Ikke Almindelige Filer | Outlook Express E-mail Folder | Microsoft Outlook Express | Microsoft Corporation |
.DCM | National Electrical Manufacturers Association (NEMA) | Rasterbilledfiler | DICOM Image File Format | ACD Systems Canvas | Microsoft Corporation |
.DCT | Microsoft Corporation | Datafiler | Dictionary File | Virtual PC 2007 | Microsoft Corporation |
.DCTX | Microsoft Corporation | Datafiler | Microsoft Office IME Open Extended Dictionary | Microsoft Office | Microsoft Corporation |
.DCTXC | Microsoft Corporation | Datafiler | Microsoft Office IME Open Extended Dictionary File | Microsoft Office | Microsoft Corporation |
.DCX | ZSoft Corporation | Rasterbilledfiler | Zsoft Multi-Page Paintbrush File | Microsoft Visual FoxPro | Microsoft Corporation |
.DD | Sage | Datafiler | Sage MAS 90 Data File | Microsoft Visual Studio | Microsoft Corporation |
.DDE | ABBYY | Datafiler | File TypeLingvo Dictionary Error Log File | Microsoft Windows | Microsoft Corporation |
.DDF | Microsoft Corporation | Indstillingsfiler | Diamond Directive File | Microsoft Notepad | Microsoft Corporation |
.DEC | Various Developers | Udviklerfiler | Declaration File | Microsoft Notepad | Microsoft Corporation |
.DEF | Microsoft Corporation | Udviklerfiler | Module Definition File | Microsoft Visual Studio | Microsoft Corporation |
.DEP | Microsoft Corporation | Udviklerfiler | Windows Dependency File | Microsoft Windows | Microsoft Corporation |
.DER | Mozilla | Webfiler | DER Certificate File | Internet Explorer | Microsoft Corporation |
.DESIGN | Microsoft Corporation | Vektorbilledfiler | Microsoft Expression Design Drawing | Microsoft Expression Studio | Microsoft Corporation |
.DESKLINK | Microsoft Corporation | Systemfiler | Desktop Shortcut | Microsoft Windows | Microsoft Corporation |
.DESKTHEMEPACK | Microsoft Corporation | Systemfiler | Microsoft Windows Theme Pack | Microsoft Windows 8 | Microsoft Corporation |
.DEV | Bloodshed Software | Udviklerfiler | Dev-C++ Project File | Microsoft Windows | Microsoft Corporation |
.DEVICEMANIFEST-MS | Microsoft Corporation | Systemfiler | Microsoft Windows Device Metadata | Microsoft Windows | Microsoft Corporation |
.DEVICEMETADATA-MS | Microsoft Corporation | Systemfiler | Device Metadata Package | Microsoft Windows | Microsoft Corporation |
.DGML | Microsoft Corporation | Udviklerfiler | Visual Studio Directed Graph Document | Microsoft Visual Studio | Microsoft Corporation |
.DGSL | Microsoft Corporation | Udviklerfiler | Microsoft Visual Studio Visual Shader Graph File | Microsoft Visual Studio | Microsoft Corporation |
.DGT | Interscape | Datafiler | Digital Gallery File | Microsoft Paint | Microsoft Corporation |
.DIA | Spacetornado Software | Databasefiler | Do It Again Task File | Microsoft SharePoint Server | Microsoft Corporation |
.DIAGCAB | Microsoft Corporation | Systemfiler | Troubleshooting Pack Cabinet File | Microsoft Windows | Microsoft Corporation |
.DIAGCFG | Microsoft Corporation | Systemfiler | Troubleshooting Pack Configuration File | Microsoft Support Diagnostic Tool | Microsoft Corporation |
.DIAGPKG | Microsoft Corporation | Systemfiler | Troubleshooting Pack File | Microsoft Support Diagnostic Tool | Microsoft Corporation |
.DIAGSESSION | Microsoft Corporation | Udviklerfiler | Diagnostics Session File | Internet Explorer | Microsoft Corporation |
.DIB | The GIMP Development Team | Rasterbilledfiler | Device Independent Bitmap File | Microsoft Windows Photos | Microsoft Corporation |
.DICPROOF | Microsoft Corporation | Indstillingsfiler | Microsoft Dictionary Proofing File | Microsoft Excel | Microsoft Corporation |
.DICT | Microsoft Corporation | Datafiler | Dictionary File | Virtual PC 2007 | Microsoft Corporation |
.DIF | Microsoft Corporation | Datafiler | Data Interchange Format | Microsoft Excel | Microsoft Corporation |
.DIP | Microsoft Corporation | Grafiske Filer | Windows Bitmap Format | Microsoft Windows | Microsoft Corporation |
.DISCO | Microsoft Corporation | Webfiler | DISCO Discovery Document | Microsoft Visual Studio | Microsoft Corporation |
.DISPOSITION-NOTIFICATION | Microsoft Corporation | Webfiler | Message Disposition Notification | Microsoft Outlook | Microsoft Corporation |
.DIT | Microsoft Corporation | Systemfiler | Active Directory Information Tree File | Microsoft Active Directory | Microsoft Corporation |
.DIZ | Unknown Developer | Tekstfiler | Description In Zip File | Microsoft Notepad | Microsoft Corporation |
.DJVU | LizardTech | Rasterbilledfiler | DjVu Image | ACD Systems Canvas | Microsoft Corporation |
.DL | Microsoft Corporation | Spilfiler | Zoo Tycoon 2 Data File | Zoo Tycoon 2 | Microsoft Corporation |
.DLG | Crytek | Spilfiler | Crysis Dialogue Data File | Microsoft Windows | Microsoft Corporation |
.DLL | Microsoft Corporation | Systemfiler | Dynamic Link Library | Microsoft Visual FoxPro | Microsoft Corporation |
.DLX | DIAL | CAD-filer | DIALux Document | Microsoft Visual Studio | Microsoft Corporation |
.DL_ | Microsoft Corporation | Komprimerede filer | Compressed DLL File | Microsoft Makecab | Microsoft Corporation |
.DMB | BYOND | Spilfiler | BYOND Game Executable | Microsoft Windows Media Player | Microsoft Corporation |
.DMK | Various Developers | 3D-billedfiler | Digimask File | Microsoft XBOX | Microsoft Corporation |
.DML | Sybase, Inc | Webfiler | DynaScript File | Internet Explorer | Microsoft Corporation |
.DMP | Microsoft Corporation | Systemfiler | Windows Memory Dump File | Microsoft Visual Studio | Microsoft Corporation |
.DMX | Valve | Videofiler | Source Filmmaker Project File | Microsoft SQL Server | Microsoft Corporation |
.DNC | Microsoft Corporation | Videofiler | Windows Dancer File | Windows Media Center | Microsoft Corporation |
.DNG | Adobe Systems Incorporated | Kamera Ubehandlede Filer | Digital Negative Image File | Microsoft Windows Photos | Microsoft Corporation |
.DO | Unknown Developer | Webfiler | Java Servlet | Internet Explorer | Microsoft Corporation |