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