| .509 | Microsoft Corporation | Fichiers Web | Internet Security Certificate | Internet Explorer | Microsoft Corporation |
| .ADP | Microsoft Corporation | Fichiers de base de données | Access Project Extension | Internet Explorer | Microsoft Corporation |
| .AHTM | Unknown Developer | Fichiers Web | HTML File | Internet Explorer | Microsoft Corporation |
| .ALX | BlackBerry | Fichiers de paramètres | BlackBerry Application Loader XML File | Internet Explorer | Microsoft Corporation |
| .ASHX | Microsoft Corporation | Fichiers Web | ASP.NET Web Handler File | Internet Explorer | Microsoft Corporation |
| .ASPX | Microsoft Corporation | Fichiers Web | Active Server Page Extended ASP.NET Script | Internet Explorer | Microsoft Corporation |
| .AXD | Microsoft Corporation | Fichiers Web | ASP.NET Web Handler File | Internet Explorer | Microsoft Corporation |
| .BOK | Pearson | Fichiers de données | TestGen Testbank File | Internet Explorer | Microsoft Corporation |
| .BQY | Oracle Corporation | Fichiers divers | Brio Query File | Internet Explorer | Microsoft Corporation |
| .CDF | Wolfram Research | Fichiers de mise en page | Computable Document Format File | Internet Explorer | Microsoft Corporation |
| .CER | Microsoft Corporation | Fichiers Web | Internet Security Certificate | Internet Explorer | Microsoft Corporation |
| .CHK | Sophos | Fichiers de données | InterCheck Checksum Database | Internet Explorer | Microsoft Corporation |
| .CHL | Leadtek Research | Fichiers de paramètres | WinFast PVR2 Channel List | Internet Explorer | Microsoft Corporation |
| .CMP | Microsoft Corporation | Fichiers de paramètres | Windows Connection Manager Profile | Internet Explorer | Microsoft Corporation |
| .CMS | Opera Software | Fichiers Web | Content Management System Web Page File | Internet Explorer | Microsoft Corporation |
| .CPC | Cartesian Products, Inc. | Fichiers Raster Image | CPC Compressed Image File | Internet Explorer | Microsoft Corporation |
| .CRT | Mozilla | Fichiers Web | Security Certificate | Internet Explorer | Microsoft Corporation |
| .DAT | Unknown Developer | Fichiers de jeu | Game Data | Internet Explorer | Microsoft Corporation |
| .DBM | Adobe Systems Incorporated | Fichiers Web | ColdFusion Server File | Internet Explorer | Microsoft Corporation |
| .DER | Mozilla | Fichiers Web | DER Certificate File | Internet Explorer | Microsoft Corporation |
| .DIAGSESSION | Microsoft Corporation | Fichiers de développeurs | Diagnostics Session File | Internet Explorer | Microsoft Corporation |
| .DLL | Microsoft Corporation | Fichiers système | Dynamic Link Library | Internet Explorer | Microsoft Corporation |
| .DML | Sybase, Inc | Fichiers Web | DynaScript File | Internet Explorer | Microsoft Corporation |
| .DO | Unknown Developer | Fichiers Web | Java Servlet | Internet Explorer | Microsoft Corporation |
| .ECE | Escenic | Fichiers Web | Escenic Dynamic Web Page | Internet Explorer | Microsoft Corporation |
| .HQZ | Microsoft Corporation | Fichiers de données | Internet Explorer For Mac File | Internet Explorer | Microsoft Corporation |
| .HT | Hilgraeve Inc | Fichiers de paramètres | HyperTerminal Session File | Internet Explorer | Microsoft Corporation |
| .HT3 | Unknown Developer | Fichiers Web | HTML File | Internet Explorer | Microsoft Corporation |
| .HTA | Microsoft Corporation | Fichiers exécutables | HTML Application | Internet Explorer | Microsoft Corporation |
| .HTC | Microsoft Corporation | Fichiers Web | HTML Component File | Internet Explorer | Microsoft Corporation |
| .HTM | Various Developers | Fichiers Web | Hypertext Markup Language File | Internet Explorer | Microsoft Corporation |
| .HTML | Various Developers | Fichiers Web | Hypertext Markup Language File | Internet Explorer | Microsoft Corporation |
| .HTMLS | Open Source | Fichiers Web | HTML With Server-Side Include | Internet Explorer | Microsoft Corporation |
| .ICW | Microsoft Corporation | Fichiers de paramètres | Microsoft Internet Explorer Internet Connection Wizard Data | Internet Explorer | Microsoft Corporation |
| .IDQ | Microsoft Corporation | Fichiers de données | Microsoft Internet Explorer Data Query File | Internet Explorer | Microsoft Corporation |
| .IHTML | Mozilla | Fichiers Web | Inline HyperText Markup Language File | Internet Explorer | Microsoft Corporation |
| .INS | Open Source | Fichiers de données | LaTeX Installer Script | Internet Explorer | Microsoft Corporation |
| .IWS | JetBrains | Fichiers de développeurs | IntelliJ IDEA Web Page | Internet Explorer | Microsoft Corporation |
| .J | Oracle Corporation | Fichiers de développeurs | Java Source File | Internet Explorer | Microsoft Corporation |
| .JFIF | Unknown Developer | Fichiers Raster Image | JPEG File Interchange Format | Internet Explorer | Microsoft Corporation |
| .JHTML | Oracle Corporation | Fichiers Web | Java HTML Web Page | Internet Explorer | Microsoft Corporation |
| .JMH | Unknown Developer | Fichiers Raster Image | JPEG File Interchange Format | Internet Explorer | Microsoft Corporation |
| .JPG-LARGE | Zoner Software | Fichiers Raster Image | Large JPEG Image | Internet Explorer | Microsoft Corporation |
| .JSPA | Xinox Software | Fichiers Web | Java Servlet Alias | Internet Explorer | Microsoft Corporation |
| .JVS | Opera Software | Fichiers Web | JavaScript Proxy Autoconfig File | Internet Explorer | Microsoft Corporation |
| .LASSO | LassoSoft | Fichiers Web | Lasso Database-Driven Web Page | Internet Explorer | Microsoft Corporation |
| .MAP | id Software | Fichiers de jeu | Quake Engine Map File | Internet Explorer | Microsoft Corporation |
| .MHT | Various Developers | Fichiers Web | MHTML Web Archive | Internet Explorer | Microsoft Corporation |
| .MHTM | Microsoft Corporation | Fichiers Web | Mime HTML (MHTML) File | Internet Explorer | Microsoft Corporation |
| .MHTML | Microsoft Corporation | Fichiers Web | Mime HTML (MHTML) File | Internet Explorer | Microsoft Corporation |
| .MSPX | Microsoft Corporation | Fichiers Web | Microsoft ASP.NET Web Page | Internet Explorer | Microsoft Corporation |
| .NMF | ESRI | Fichiers GIS | ArcGIS Explorer Map File | Internet Explorer | Microsoft Corporation |
| .ODC | Microsoft Corporation | Fichiers de paramètres | Office Data Connection File | Internet Explorer | Microsoft Corporation |
| .PAC | NetScape | Fichiers Web | Proxy Auto-Config File | Internet Explorer | Microsoft Corporation |
| .PARTIAL | Microsoft Corporation | Fichiers divers | Internet Explorer Partially Downloaded File | Internet Explorer | Microsoft Corporation |
| .PHP4 | Open Source | Fichiers Web | PHP 4 Web Page | Internet Explorer | Microsoft Corporation |
| .PHT | Microsoft Corporation | Fichiers Web | Partial Hypertext | Internet Explorer | Microsoft Corporation |
| .PHTML | Opera Software | Fichiers Web | PHP Web Page | Internet Explorer | Microsoft Corporation |
| .PJPEG | Microsoft Corporation | Fichiers Raster Image | Progressive JPEG Image | Internet Explorer | Microsoft Corporation |
| .PRF | Microsoft Corporation | Fichiers de paramètres | Outlook Profile File | Internet Explorer | Microsoft Corporation |
| .QRM | Armangil Software | Fichiers Web | Qworum Message File | Internet Explorer | Microsoft Corporation |
| .RHTML | Yukihiro “Matz” Matsumoto | Fichiers Web | Ruby HTML Web Page | Internet Explorer | Microsoft Corporation |
| .RMH | Microsoft Corporation | Fichiers de données | Rights-Managed HTML Document File | Internet Explorer | Microsoft Corporation |
| .RMT | The Catalina Group | Fichiers système | Router Firmware File | Internet Explorer | Microsoft Corporation |
| .RTC | Brain Innovation | Fichiers de données | BrainVoyager QX Design Matrix File | Internet Explorer | Microsoft Corporation |
| .SDL | Microsoft Corporation | Fichiers de développeurs | Service Description Language File | Internet Explorer | Microsoft Corporation |
| .SHTM | Opera Software | Fichiers vidéo | HTML Server Side Include File | Internet Explorer | Microsoft Corporation |
| .SMIL | "Synchronized Multimedia" Working Group (SYMM WG) | Fichiers vidéo | SMIL(Synchronized Multimedia Integration Language) Presentation File | Internet Explorer | Microsoft Corporation |
| .SML | ESRI | Fichiers de développeurs | ARC/INFO Simple Macro Language File | Internet Explorer | Microsoft Corporation |
| .SPOP | Opera Software | Fichiers de données | InterTrust SPOP File | Internet Explorer | Microsoft Corporation |
| .SSH | Microsoft Corporation | Fichiers Web | Microsoft Internet Explorer Style Sheet | Internet Explorer | Microsoft Corporation |
| .STM | Microsoft Corporation | Fichiers de données | Exchange Streaming Media File | Internet Explorer | Microsoft Corporation |
| .TMP | Mozilla | Fichiers de sauvegarde | General Temporary File | Internet Explorer | Microsoft Corporation |
| .URL | Microsoft Corporation | Fichiers Web | Internet Shortcut | Internet Explorer | Microsoft Corporation |
| .VBD | Microsoft Corporation | Fichiers Web | Visual Basic ActiveX Document | Internet Explorer | Microsoft Corporation |
| .VRT | Superscape | Fichiers Web | Virtual World | Internet Explorer | Microsoft Corporation |
| .W | Progress Software Corporation | Fichiers de développeurs | OpenEdge Architect Source Code File | Internet Explorer | Microsoft Corporation |
| .WAF | Microsoft Corporation | Fichiers temporaires | Internet Explorer For Mac Cache | Internet Explorer | Microsoft Corporation |
| .WEBM | Google | Fichiers vidéo | WebM Video File | Internet Explorer | Microsoft Corporation |
| .WEBSITE | Microsoft Corporation | Fichiers Web | Internet Explorer Pinned Site Shortcut | Internet Explorer | Microsoft Corporation |
| .WML | Syncro Soft | Fichiers Web | Wireless Markup Language File | Internet Explorer | Microsoft Corporation |
| .WMV | Microsoft Corporation | Fichiers vidéo | Windows Media Video File | Internet Explorer | Microsoft Corporation |
| .WOA | Apple | Fichiers Web | WebObjects Application | Internet Explorer | Microsoft Corporation |
| .WOFF | Open Source | Fichiers de police d’écriture | Web Open Font Format File | Internet Explorer | Microsoft Corporation |
| .XBAP | Microsoft Corporation | Fichiers exécutables | XAML Browser Application File | Internet Explorer | Microsoft Corporation |
| .XHTM | Opera Software | Fichiers Web | Extensible Hypertext Markup Language Document | Internet Explorer | Microsoft Corporation |
| .XHTML | Opera Software | Fichiers Web | Extensible Hypertext Markup Language Document | Internet Explorer | Microsoft Corporation |
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