| File extension | Developer/Producer | File description |
|---|---|---|
| X file extension | N/A | Lex Language Source Code |
| X-PNG file extension | Boris Eyrich | Portable (Public) Network Graphic Bitmap |
| X01 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X02 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X03 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X04 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X05 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X06 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X07 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X08 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X09 file extension | Corel Corporation | Corel Paradox Secondary Index |
| X1 file extension | X1 Technologies, Inc. | X1 Desktop Search Saved Search |
| X10 file extension | X.Org Foundation | X Window Bitmap Dump |
| X11 file extension | X.Org Foundation | X Window System Bitmap Image |
| X13 file extension | Darxabre | Hooligans Game Archive |
| X20 file extension | Jeffrey C Johnson (XTree Company) | XTree Gold For Dos Help |
| X32 file extension | Adobe Systems | Adobe Xtra Format |
| X3A file extension | N/A | MOTIF XF |
| X3D file extension | MAGIX | X3D Format |
| X3DB file extension | Web3D Consortium | X3D Binary Format |
| X3DV file extension | Web3D Consortium | Web3D X3D Graphics Image |
| X3F file extension | SIGMA | Sigma Camera RAW Picture Format |
| X3G file extension | MakerBot Industries, LLC | MakerBot MakerWare Document |
| X40 file extension | Jeffrey C Johnson (XTree Company) | XtreeGold Dos Help |
| X4K file extension | Optimal Performance | XML4King Configuration Format |
| X50 file extension | Jeffrey C Johnson (XTree Company) | XTreeGold Dos Help |
| X60 file extension | Jeffrey C Johnson (XTree Company) | Xtree Gold For Dos Help |
| X64 file extension | N/A | Commodore 64 Emulator Disk Image |
| X70 file extension | Jeffrey C Johnson (XTree Company) | XTree Gold For Dos Help |
| X80 file extension | Jeffrey C Johnson (XTree Company) | Xtree Gold DOS Help |
| X90 file extension | Jeffrey C Johnson (XTree Company) | XTree Gold For Dos Help |
| XA file extension | Electronic Arts | The Sims Extensive Audio Format |
| XA0 file extension | Jeffrey C Johnson (XTree Company) | Xtree Gold Dos Help |
| XAB file extension | Microsoft Corporation | Microsoft Outlook Express Address Book |
| XAC file extension | Electronic Arts, Inc. | SimCity Societies Game |
| XAD file extension | N/A | EXotic ADlib Sound Format |
| XADD file extension | Microsoft | Expression Web Add-in |
| XADML file extension | Cloanto Italia srl | Amiga Forever XADML |
| XAF file extension | Autodesk | Xml Compatible Animation Format |
| XAIML file extension | Devyn Collier Johnson | XAIML Database Format |
| XAML file extension | Microsoft | XAML Format |
| XAMLX file extension | Microsoft | Visual Studio Workflow Service Format |
| XAN file extension | Team17 Software | Worms 3D Map Format |
| XAP file extension | Microsoft | Microsoft Silverlight Application Package Format |
| XAPPL file extension | Spoon | Virtual Application Studio XML Application Configuration Format |
| XAR file extension | MAGIX | Xara Vector Drawing Format |
| XARC file extension | Funcom | The Longest Journey Audio |
| XAS file extension | Parametric Technology | PTC Pro/Engineer Assembly Format |
| XAV file extension | Final Draft, Inc. | Final Draft AV Document |
| XAVC file extension | N/A | Sony XAVC Video Format |
| XB0 file extension | Jeffrey C Johnson (XTree Company) | Xtree Gold DOS Help |
| XBA file extension | Oracle | OpenOffice.org Basic Module Format |
| XBAP file extension | Microsoft | XAML Browser Application Format |
| XBB file extension | DVIPDFMx Project Team | DVIPDFMx Output |
| XBC file extension | SMART Technologies | SMART Notebook Format |
| XBD file extension | Fuji Xerox Co., Ltd. | Fuji Xerox Docuworks |
| XBDOC file extension | Xiosis | Xiosis Scribe Document |
| XBE file extension | Microsoft | Xbox Executable Format |
| XBEL file extension | Python XML SIG | XBEL Bookmarks Format |
| XBF file extension | Electronic Arts, Inc. | Emperor Battle For Dune |
| XBK file extension | SMART Technologies | SMART Notebook Format |
| XBL file extension | Mozilla | Extensible Binding Language Format |
| XBLR file extension | N/A | Output Raw XBRL |
| XBM file extension | N/A | X Windows System Bitmap Image |
| XBMML file extension | N/A | Braille Music Score |
| XBMP file extension | Midway Home Entertainment Inc. | Area 51 Game |
| XBN file extension | HyperG/Smuggl0r | Xnick Nick Backup |
| XBPLATE file extension | Xiosis | Xiosis Scribe Template |
| XBRL file extension | N/A | Extensible Business Reporting Language |
| XBSAV file extension | Electronic Arts | Mass Effect 2 For Xbox Saved Game Format |
| XBT file extension | SMART Technologies | SMART Notebook Template Format |
| XBX file extension | Microsoft Corporation | Xbox Icon Or Picture |
| XC0 file extension | Jeffrey C Johnson (XTree Company) | Xtree Gold Dos Help |
| XC3 file extension | Cast3D project team | Cast3D 3D Scene |
| XCAPPDATA file extension | Apple | Apple Xcode Application Data Format |
| XCARCHIVE file extension | Apple | Xcode Archive |
| XCCONFIG file extension | Apple, Inc. | Apple Xcode Configuration Settings |
| XCDATAMODEL file extension | Apple | Xcode Core Data Model Format |
| XCDATAMODELD file extension | Apple | Xcode Core Data Model Format |
| XCEL file extension | Microsoft Corporation | Microsoft Excel For Mac Spreadsheet |
| XCF file extension | GIMP | GIMP XCF Bitmap Image Format |
| XCH file extension | Link-Assistant.com | LinkAssistant Project Settings |
| XCI file extension | Adobe Systems Incorporated | Adobe Reader Font Mapping |
| XCL file extension | Jeffrey C Johnson (XTree Company) | XTree For Windows Script |
| XCM file extension | IHMC | CmapTools Exported Concept Map |
| XCO file extension | Xilinx, Inc. | Xilinx CORE Generator Log |
| XCODE file extension | N/A | Xcode Development Project Format |
| XCODEPLUGIN file extension | Apple, Inc. | Apple Xcode Extension |
| XCODEPROJ file extension | N/A | XCode Project Format |
| XCOF file extension | Apple, Inc. | Mac OS Object Library |
| XCON file extension | Ankit Malhotra | Conceal Encrypted Data |
| XCORPUS file extension | University of Oxford | Xaira Corpora |
| XCP file extension | Advanced Systems Concepts, Inc. | XLNT Script Command |
| XCPLUGIN file extension | Apple, Inc. | Apple Xcode Extension |
| XCPLUGINDATA file extension | Apple, Inc. | Xcode Plug-in Data |
| XCR file extension | Enlight Software. Ltd. | Warlords Battlecry Game |
| XCSCHEME file extension | Apple, Inc. | Apple Xcode Scheme |
| XCSL file extension | Technicolor | CineStyle Color Correction Settings Format |
| XCSNAPSHOTS file extension | Apple | Xcode Snapshot |
| XCT file extension | N/A | XVI32 Conversion |
| XCTL file extension | National Instruments Corporation | LabVIEW XControls |
| XCU file extension | OpenOffice.org | OpenOffice.org Extension Control Format |
| XCUSERSTATE file extension | Apple, Inc. | Xcode |
| XCWORKSPACE file extension | Apple | Xcode Workspace Format |
| XD0 file extension | Jeffrey C Johnson (XTree Company) | XtreeGold Dos Help |
| XDA file extension | Sencha Inc. | Sencha Architect Project |
| XDB file extension | Symantec | Norton Antivirus Update Format |
| XDC file extension | Adobe Systems Incorporated | Adobe Acrobat Printer Description |
| XDF file extension | IBM | Extended Disk Format Image |
| XDFL file extension | XDFLengine Team | XDFL Configuration |
| XDI file extension | WinArchiver Computing | WinArchiver Compressed ISO Image Format |
| XDL file extension | N/A | MS SQL Server XML Schema Format |
| XDO file extension | Oracle Corporation | Oracle BI Publisher Resource Tracking |
| XDOC file extension | N/A | QuarkXPress 3.0 Document |
| XDOCLET file extension | Red Hat, Inc. | JBoss XDoclet Reference |
| XDP file extension | N/A | Acrobat XML Data Package Format |
| XDR file extension | Microsoft | XML Data Reduced Format |
| XDS file extension | Invisionsoft | Nintendo DS Game Maker Project Format |
| XDT file extension | Olivier F5MZN | Win-Test Extra Data |
| XDU file extension | N/A | Backdoor.Win32.PcClient.xdu |
| XDV file extension | N/A | XeTeX |
| XDW file extension | Fuji Xerox | DocuWorks Document Format |
| XE0 file extension | Jeffrey C Johnson (XTree Company) | XtreeGold Dos Help |
| XEF file extension | N/A | X-Genics EManager Form Data Format |
| XEJ file extension | Microsoft | Microsoft Expression Encoder Job Format |
| XEL file extension | Microsoft | Microsoft Expression Encoder 3.0 Live Jobs Format |
| XEM file extension | N/A | X-Genics EManager Metered Units |
| XEN file extension | Activision | Activision Guitar Hero 3 Data Format |
| XENSEARCH file extension | Citrix | XenCenter Saved Search Format |
| XEO file extension | Signwave UK | Signwave Auto-Illustrator Extension |
| XEP file extension | N/A | EManager File Packing Definition |
| XEQ file extension | The Sage Group plc | Sage MAS 90 Data |
| XER file extension | Oracle | Primavera Project Management Propriety Exchange Format |
| XES file extension | N/A | X-Genics EManager Skins Definition |
| XESC file extension | Microsoft | Microsoft Expression Encoder Screen Capture Format |
| XET file extension | N/A | X-Genics EManager Process Definition |
| XEV file extension | N/A | X-Genics EManager Auto-update Format |
| XEVGENXML file extension | Adobe Systems Incorporated | Adobe Dreamweaver |
| XEX file extension | Microsoft | Xbox 360 Executable Format |
| XEZ file extension | N/A | X-Genics EManager Template Package |
| XFA file extension | OneCNC LLC | OneCncXR CAD |
| XFBIN file extension | CyberConnect2 | Naruto Shippuden: Ultimate Ninja Storm 2 |
| XFC file extension | Blacksun Software | X-Fonter Font Collection |
| XFD file extension | UWI | Adobe XFDL Format XML Form Format |
| XFDF file extension | Adobe Systems | Adobe Acrobat Forms Document |
| XFDL file extension | UWI | XFDL Format |
| XFF file extension | Martin Haluza | XFRX Database Output |
| XFI file extension | xICE.NET | XICE Desktop Encrypted |
| XFL file extension | Adobe Systems | Adobe Flash Exchange Format |
| XFM file extension | Nuance Communications, Inc. | OmniForm XML |
| XFN file extension | N/A | Corel Ventura Printer Font |
| XFO file extension | N/A | XSL-FO Formatted Form |
| XFP file extension | Microsoft Corporation | Microsoft SharePoint Extending Form Library Properties |
| XFR file extension | TIBCO Software | IProcess Process Definition Format |
| XFS file extension | eRacer | ERacer Sound Format |
| XFT file extension | N/A | Adobe Form Designer Form |
| XFZ file extension | Declan Software | French FlashCards Vocabulary |
| XG0 file extension | Corel Corporation | Corel Paradox Secondary Index |
| XG1 file extension | Corel Corporation | Corel Paradox Secondary Index |
| XG2 file extension | Corel Corporation | Corel Paradox Secondary Index |
| XG3 file extension | Corel Corporation | Corel Paradox Secondary Index |
| XG4 file extension | Corel Corporation | Corel Paradox Secondary Index |
| XG5 file extension | Corel Corporation | Corel Paradox Secondary Index |
| XGA file extension | Imagine Sports | Diamond Mind Baseball Game Account Information |
| XGD file extension | Microsoft Corporation | Xbox 360 Game Disc Layout |
| XGL file extension | N/A | XGL 3D CAD Model |
| XGLL file extension | AFMG Technologies GmbH | EASE SpeakerLab Text |
| XGML file extension | N/A | Graph Modeling Language XML Format |
| XGMML file extension | N/A | XGMML Graph Format |
| XGO file extension | GeoConcept SA | GeoConcept Add-on |
| XGP file extension | XGP | Xfire Profile Patcher Game List Format |
| XGS file extension | Microsoft | XACT Global Settings Format |
| XHB file extension | N/A | HomeBank Data |
| XHP file extension | OpenOffice.org Project Team | OpenOffice.org Extension Help Format |
| XHTM file extension | N/A | Extensible HTML Format |
| XHTML file extension | N/A | Extensible HTML Format |
| XI file extension | N/A | Fastracker 2.0 Instrument Format |
| XIB file extension | Apple | Apple Interface Builder Format |
| XIF file extension | Nuance Communications | ScanSoft Pagis Format |
| XIG file extension | N/A | XML Instance Generator |
| XIL file extension | SourceForge.net | Xilize |
| XILINC file extension | SourceForge.net | Xilize Defintion |
| XILIZE file extension | SourceForge.net | Xilize Configuration |
| XIM file extension | N/A | X11 Xim Toolkit Bitmap |
| XIN file extension | Stilo International plc | OmniMark Include |
| XIP file extension | N/A | Xbox Dashboard |
| XISE file extension | Xilinx | Xilinx ISE Project Format |
| XISO file extension | xiso | Xbox ISO |
| XIT file extension | New River Kinematics | SpatialAnalyzer |
| XIT64 file extension | New River Kinematics | SpatialAnalyzer |
| XIX file extension | N/A | IIS NNTP Subject Lists |
| XIZ file extension | SourceForge.net | Ximinez |
| XJB file extension | Oracle Corporation | OEPE JAXB Wizard Bindings |
| XJT file extension | The GIMP Team | Compressed GIMP Image |
| XKM file extension | Various Linux developers | X KeyBoard |
| XL file extension | Microsoft | Microsoft Excel Spreadsheet Format |
| XLA file extension | Microsoft | Microsoft Excel Add-in Format |
| XLA5 file extension | Microsoft Corporation | Microsoft Excel 5 For Mac Add-in |
| XLA8 file extension | Microsoft Corporation | Microsoft Excel 98 For Mac Add-in |
| XLAM file extension | Microsoft | Microsoft Excel 2007/2010 Open XML Macro-enabled Add-in Format |
| XLAMENX file extension | Egis Technology Inc. | Egis Encrypted Excel XLAM |
| XLA_ file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Add-in |
| XLB file extension | Microsoft | Microsoft Excel Toolbars Format |
| XLB4 file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Toolbars |
| XLB5 file extension | Microsoft Corporation | Microsoft Excel 5 For Mac Toolbars |
| XLB8 file extension | Microsoft Corporation | Microsoft Excel 98 For Mac Toolbars |
| XLBN file extension | Microsoft Corporation | Microsoft Excel 1 For Mac Toolbars |
| XLC file extension | Microsoft | Microsoft Excel Chart Format |
| XLC3 file extension | Microsoft Corporation | Microsoft Excel 3 For Mac Chart |
| XLC4 file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Chart |
| XLC_ file extension | Microsoft Corporation | Microsoft Excel 2 For Mac Chart |
| XLD file extension | Microsoft | Microsoft Excel Dialogue Format |
| XLDB file extension | PRIORITY DISPATCH CORP. | AQUA Data |
| XLG file extension | Autodesk, Inc. | AutoCAD External Reference Log |
| XLGC file extension | Prosystech | ExpressK Database Format |
| XLI file extension | Siemens Product Lifecycle Management Software Inc. | SIEMENS PLM Software NX 7.5 Log |
| XLIFF file extension | OASIS | XLIFF Localization Format |
| XLK file extension | Microsoft | Microsoft Excel Backup Format |
| XLL file extension | Microsoft | Microsoft Excel Add-in Format |
| XLL_ file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Add-in |
| XLM file extension | Microsoft | Microsoft Excel Macro Format |
| XLM3 file extension | Microsoft Corporation | Microsoft Excel 3 For Mac Macro |
| XLM4 file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Macro |
| XLMV file extension | Thunder Network Technologies | Thunder Mall Video Format |
| XLMX file extension | Microsoft Corporation | Microsoft Excel Macro-enabled Spreadsheet |
| XLM_ file extension | Microsoft Corporation | Microsoft Excel 2 For Mac Macro |
| XLNK file extension | N/A | XML Link Format |
| XLO file extension | Autodesk, Inc. | Autodesk Inventor Export Journal |
| XLPF file extension | Microsoft Corporation | Microsoft Excel For Mac Setting |
| XLR file extension | Microsoft | Microsoft Works Spreadsheet Or Chart Format |
| XLS file extension | Microsoft | Microsoft Excel 97 To 2003 Workbook Format |
| XLS3 file extension | Microsoft Corporation | Microsoft Excel 3 For Mac Spreadsheet |
| XLS4 file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Spreadsheet |
| XLS5 file extension | Microsoft Corporation | Microsoft Excel 5 For Mac Spreadsheet |
| XLS8 file extension | Microsoft Corporation | Microsoft Excel 98 For Mac Spreadsheet |
| XLSB file extension | Microsoft | Microsoft Excel 2007/2010 Binary Workbook Format |
| XLSENX file extension | Egis Technology Inc. | Egis Encrypted Excel XLS |
| XLSHTML file extension | Microsoft | Microsoft Office Excel HTML Document Format |
| XLSM file extension | Microsoft | Microsoft Excel 2007/2010 Open XML Macro-enabled Workbook Format |
| XLSMHTML file extension | Microsoft | Microsoft Excel MIME HTML Spreadsheet Format |
| XLSX file extension | Microsoft | Microsoft Excel 2007, Excel 2010 And Excel 2013 Open XML Workbook Format |
| XLSXENX file extension | Egis Technology Inc. | Egis Encrypted Excel XLSX |
| XLS_ file extension | Microsoft Corporation | Microsoft Excel For Mac Spreadsheet |
| XLT file extension | Microsoft | Microsoft Excel 97 To 2003 Workbook Template Format |
| XLTHTML file extension | Microsoft | Microsoft Office Excel HTML Template Format |
| XLTM file extension | Microsoft | Microsoft Excel 2007/2010 Open XML Macro-enabled Workbook Template Format |
| XLTX file extension | Microsoft | Microsoft Excel 2007/2010 Open XML Workbook Template Format |
| XLV file extension | Microsoft | Microsoft Excel VBA Module Format |
| XLW file extension | Microsoft | Microsoft Excel Workspace Format |
| XLW3 file extension | Microsoft Corporation | Microsoft Excel 3 For Mac Workbook |
| XLW4 file extension | Microsoft Corporation | Microsoft Excel 4 For Mac Workbook |
| XLW5 file extension | Microsoft Corporation | Microsoft Excel 5 For Mac Workbook |
| XLW_ file extension | Microsoft Corporation | Microsoft Excel 2 For Mac Workbook |
| XLXML file extension | Microsoft Corporation | Microsoft Excel XML Worksheet |
| XLZ file extension | CPT | Crossword Power Tools Crossword Library |
| XM file extension | Fasttracker | FastTracker 2 Instrument |
| XMAP file extension | XMind | XMind 2007/2008 Workbook |
| XMB file extension | Microsoft | Microsoft Age Of Empires Game Data Format |
| XMC file extension | Lingoes Project | Lingoes Configuration |
| XMCD file extension | Parametric Technology Corporatio | PTC Mathcad Worksheet Format |
| XMCDZ file extension | Parametric Technology Corporation | PTC Mathcad Compressed Worksheet Format |
| XMCT file extension | PTC | Mathcad Template Format |
| XMD file extension | Disc4You | GameJack Virtual CD Or DVD Image Format |
| XME file extension | ISIS / Vanderbilt University / School of Engineering | GME |
| XMEF file extension | LexisNexis | TextMap Evidence Format |
| XMF file extension | N/A | EXtensible Music Format |
| XMG file extension | Funcom | The Longest Journey XMG |
| XMI file extension | N/A | Miles Sound System Extended MIDI Files |
| XMIND file extension | XMind | XMind Workbook Format |
| XMIT file extension | N/A | IBM XMIT Data |
| XML file extension | N/A | XML Document Format |
| XML-PREV file extension | Oracle Corporation | VirtualBox XML Settings Backup |
| XMLA file extension | N/A | XML For Analysis Source |
| XMLJET file extension | The Eclipse Foundation | Eclipse JET XML Template |
| XMLPER file extension | N/A | LeCroy Binary Waveform Format |
| XMLS file extension | Microsoft Corporation | Microsoft Excel 2003 XML |
| XMLX file extension | Microsoft Corporation | Excel Spreadsheet |
| XMM file extension | Autodesk | 3ds Max XML Animation Map Format |
| XMMAP file extension | Mindjet | MindManager XML Map Format |
| XMMAS file extension | Mindjet | MindManager XML Theme |
| XMMAT file extension | Mindjet | MindManager XML Template |
| XMO file extension | Adobe Systems Incorporated | Adobe Authorware Movie Driver |
| XMOD file extension | Datawatch Corporation | Datawatch Monarch Model |
| XMP file extension | Adobe Systems | Adobe Extensible Metadata Platform Format |
| XMPSES file extension | Adobe Systems Incorporated | Adobe Premiere Elements |
| XMPSKIN file extension | Un4seen Developments | XMPlay Skin |
| XMPZ file extension | Benetech | Miradi XML Project Format |
| XMS file extension | Microsoft Corporation | Microsoft EXtended Memory Specification |
| XMT file extension | XMind Ltd. | XMind Workbook Template |
| XMTA file extension | Microsoft Corporation | Microsoft Visual Studio XMTA Document |
| XMV file extension | Microsoft | Microsoft Xbox Video Format |
| XMX file extension | Autodesk, Inc. | AutoCAD External Message Compiled |
| XMZ file extension | N/A | Fasttracker 2 Extended Module Format |
| XN file extension | Red Hat, Inc. | Cygnus Ld-scripts |
| XNB file extension | Microsoft | XNA Game Studio Express XNA Framework Content Pipeline Binary Format |
| XND file extension | Logistical Computing and Internetworking (LoCI) Laboratory | ExNode Download |
| XNF file extension | Satinmage | Extensible Numerical |
| XNK file extension | N/A | Microsoft Exchange Shortcut Format |
| XNODE file extension | National Instruments Corporation | LabVIEW |
| XNP file extension | N/A | XnView Addon |
| XNT file extension | Quark | QuarkXPress Extension Format |
| XNV file extension | N/A | NVision Layout |
| XOB file extension | Nematron | EasyBuilder 8000 Compiled Code |
| XOF file extension | RenderMorphics | RenderMorphics Reality Lab 3D Image Format |
| XOJO_BINARY_MENU file extension | Xojo, Inc. | Xojo Binary Menu |
| XOJO_BINARY_PROJECT file extension | Xojo, Inc. | Xojo Binary Project |
| XOJO_BINARY_WINDOW file extension | Xojo, Inc. | Xojo Binary Window |
| XOJO_MENU file extension | Xojo, Inc. | Xojo Menu |
| XOJO_PROJECT file extension | Xojo, Inc. | Xojo Programming Project |
| XOJO_WINDOW file extension | Xojo, Inc. | Xojo Window |
| XOJO_XML_MENU file extension | Xojo, Inc. | Xojo XML Menu |
| XOJO_XML_WINDOW file extension | N/A | Xojo XML Window |
| XOL file extension | N/A | Swiss Map Overlay Format |
| XOM file extension | Team 17 Software | Worms 3D Object Format |
| XOML file extension | N/A | Windows Workflow Format |
| XOP file extension | N/A | IGOR Pro Add-on |
| XOV file extension | Rapidform, Inc. | RapidForm XOV 3D Inspection/Model |
| XP file extension | N/A | Fasttracker Pattern |
| XP0 file extension | N/A | SecretPhotos Puzzle Graphic Image |
| XP2 file extension | XPilot NG | XPilot NG |
| XP3 file extension | KiriKiri | KiriKiri Package Format |
| XP4 file extension | KiriKiri | KiriKiri Package |
| XPAC file extension | Sega Corporation | Sonic & Sega All-Stars Racing For PC Game Audio Archive |
| XPADDERCONTROLLER file extension | Xpadder | Xpadder Controller Layout Format |
| XPADDERPROFILE file extension | N/A | Xpadder Settings |
| XPB file extension | Tony D. Jones | XPB! Basic Source Code |
| XPD file extension | Sony | PlayStation Store PSP License Format |
| XPDL file extension | Workflow Management Coalition | XPDL Module |
| XPF file extension | Oreans Technologies | XProtector Project |
| XPG file extension | Indigo Rose | Autoplay Media Studio Exported Page |
| XPGT file extension | Adobe Systems Incorporated | EPUB XML Stylesheet Page Template |
| XPI file extension | Mozilla | Firefox Browser Extension Format |
| XPJ file extension | Adobe Systems | RoboHelp HTML Project Format |
| XPK file extension | THQ | WWE RAW Model Format |
| XPKU file extension | Apple, Inc. | Apple Mac OS X Universal Binary Package |
| XPL file extension | LcdStudio | LcdStudio Configuration Playlist |
| XPL2 file extension | Skyline Software Systems Inc. | TerraExplorerPro LOD Parameter |
| XPM file extension | N/A | X11 Pixmap Graphic |
| XPNG file extension | N/A | Portable (Public) Network Graphic Bitmap |
| XPP file extension | Microsoft | X++ Source Code Format |
| XPR file extension | Parametric Technology | PTC Pro/ENGINEER Part Format |
| XPR3 file extension | N/A | QuarkXpress 3.0 Mac |
| XPRJ file extension | Datawatch Corporation | Monarch XML Project |
| XPS file extension | Microsoft | XML Paper Specification Format |
| XPS~ file extension | Stardock Corporation | WindowBlinds Temporary |
| XPT file extension | N/A | Mozilla Firefox Component |
| XPTIN file extension | XP Solutions Inc. | Xpswmm Hydrology Data |
| XPW file extension | Intercon Associates Inc. | Accessible FormNet Fillable Form |
| XPX file extension | Intercon Associates Inc. | Intercon FormNet |
| XPY file extension | Leading Market Technologies, Inc. | MarketBrowser |
| XP~ file extension | Stardock Corporation | WindowBlinds Temporary |
| XQ file extension | The W3C XML Query Working Group | XQuery Format |
| XQL file extension | The W3C XML Query Working Group | XML Query Language Format |
| XQM file extension | The W3C XML Query Working Group | XQuery Module |
| XQT file extension | N/A | SuperCalc Macro Spreadsheet Format |
| XQUERY file extension | The W3C XML Query Working Group | XQuery Source Code Format |
| XQY file extension | The W3C XML Query Working Group | XQuery Source Format |
| XR file extension | Red Hat, Inc. | Cygnus Ld-scripts |
| XRC file extension | Adobe Systems Incorporated | WxWidgets WxPython Resource |
| XRD file extension | N/A | Core Wars Data |
| XRDML file extension | PANalytical B.V. | PANalytical XRD Measurement Data XML |
| XREF file extension | IBM | IBM AIX Cross Reference |
| XRF file extension | Cal3D | Cal3D XML Materials Format |
| XRFF file extension | University of Waikato | Extensible Attribute-Relation File Format |
| XRL file extension | Sybase Inc. | PowerDesigner Report |
| XRM-MS file extension | Microsoft | Microsoft Security Certificate |
| XRNS file extension | Renoise | Extended Renoise Song Format |
| XRP file extension | Stand By Soft | RationalPlan Format |
| XRS file extension | RealNetworks, Inc. | RealPlayer Plugin External Resources |
| XRX file extension | Microsoft Corporation | Expression Encoder Media Profile Settings |
| XRY file extension | Micro Systemation | XRY Data Format |
| XS file extension | Microsoft | Age Of Empires 3 Map AI Generator Format |
| XS4 file extension | AIS | XESS Worksheet |
| XS5 file extension | AIS | XESS Worksheet |
| XSB file extension | Microsoft | XACT Sound Bank |
| XSC file extension | Microsoft | Microsoft Visual Studio XSC Format |
| XSD file extension | N/A | XML Schema Description Format |
| XSF file extension | Microsoft | Microsoft Office InfoPath Format |
| XSI file extension | Autodesk | SOFTIMAGE|XSI 3D Model |
| XSIADDON file extension | Autodesk | SOFTIMAGE XSI Add-on Format |
| XSL file extension | N/A | XML Stylesheet Format |
| XSLIC file extension | Citrix | XenServer License Format |
| XSLT file extension | N/A | XSL Transform Format |
| XSM file extension | Electronic Arts, Inc. | SimCity Societies Game |
| XSN file extension | Microsoft | Microsoft Office InfoPath Template Form Format |
| XSO file extension | Ultrapico | Expresso Project |
| XSP file extension | XBMC | XBMC Smart Playlist Format |
| XSPF file extension | N/A | XML Shareable Playlist Format |
| XSQL file extension | Oracle Corporation | Oracle XSQL Servlet Server Side |
| XSR file extension | FabTrol Systems | FabTrol MRP |
| XSS file extension | Oracle | XML Style Sheet |
| XSSLOG file extension | Microsoft Corporation | Microsoft SharePoint WorkSpace Groove Log |
| XSSR file extension | Microsoft Corporation | Microsoft SharePoint WorkSpace Groove |
| XST file extension | IBM | IBM WebSphere Query Template Format |
| XSTB file extension | Nuance Communications, Inc. | TextBridge |
| XSTK file extension | xStarter Solutions, Inc. | XStarter Task |
| XSU file extension | IBM | Fortran 77 Library |
| XSVF file extension | Xilinx | Xilinx Serial Vector Format |
| XSX file extension | Microsoft | Microsoft Visual Studio XML Schema Layout Format |
| XT file extension | N/A | FastTracker Music Track Format |
| XTC file extension | MartinFischer | XTrkCAD Project |
| XTD file extension | N/A | XML Type Definition |
| XTERME file extension | WinStep Software Technologies | Winstep Extreme Theme |
| XTF file extension | N/A | EXtended Triton Format |
| XTG file extension | Ben StĂÂśver | Extensible TreeGraph Format |
| XTIC file extension | Promethean World plc | ActivInspire Ticker |
| XTL file extension | Pterodon | Vietcong Game Data Format |
| XTM file extension | Onder Arslan | Xtremsplit Split Data Format |
| XTML file extension | Altairis, s. r. o. | XML4web Virtual HTML Document |
| XTMP file extension | Avid Technology, Inc. | Avid Xpress Pro Template |
| XTND file extension | N/A | Adobe Acrobat For Mac Plug-In |
| XTODVD file extension | VSO-Software | ConvertXtoDVD Project |
| XTP file extension | Autodesk | AutoCAD Exported Tool Palettes Format |
| XTRA file extension | Adobe Systems Incorporated | Adobe Director Xtra |
| XTREME file extension | Winstep Software Technologies | Winstep Xtreme Theme Pack Format |
| XTRL file extension | N/A | XTND Translator |
| XTXT file extension | The Eclipse Foundation | Xtext |
| XUI file extension | Microsoft | Xbox 360 Skin Format |
| XUL file extension | Mozilla | Firefox XML User Interface Language Format |
| XUR file extension | Microsoft | Xbox 360 Compiled Skin Format |
| XV file extension | N/A | Khoros Visualization Bitmap Image |
| XV0 file extension | Lattice Technology | Lattice XVL Structure Format |
| XV2 file extension | Lattice Technology, Inc. | V-XVL Geometry |
| XV3 file extension | Lattice Technology | P-XVL Geometry Format |
| XVA file extension | Citrix | Citrix Xen Virtual Appliance Format |
| XVCT file extension | MindVision Software | VISE XML Project Format |
| XVG file extension | Grace Development Team | Grace Document |
| XVID file extension | Xvid | XviD Codec |
| XVL file extension | Lattice Technology, Inc. | EXtensible Virtual World Description Language Document |
| XVM file extension | VMware | VMware Console Configuration Format |
| XVMCONF file extension | XVM | World Of Tanks Configuration Format |
| XVO file extension | RatDVD.CA | RatDVD Internal |
| XVU file extension | Comodo Group, Inc. | BOClean Database Format |
| XWB file extension | Microsoft | XACT Wave Bank Format |
| XWC file extension | Starbreeze | Starbreeze Sound |
| XWD file extension | N/A | X Window Window Screen Dump Or Bitmap |
| XWF file extension | Nuance Communications | OmniPage Workflow Format |
| XWI file extension | LucasArts Entertainment Company, LLC | Star Wars: X-Wing Mission |
| XWK file extension | Intel | Crosstalk Keyboard Mapping Format |
| XWM file extension | Bethesda Softworks LLC | The Elder Scrolls V: Skyrim Music |
| XWMA file extension | Microsoft Corporation | XWMA Audio Compression Format |
| XWMV file extension | Microsoft Corporation | Microsoft Windows Media |
| XWP file extension | N/A | XMLwriter Project |
| XWS file extension | MAGIX | Xara Webstyle Format |
| XX file extension | N/A | XXEncoded Format |
| XXD file extension | Brixx | Brixx Planner Calendar Format |
| XXE file extension | N/A | XXEncoded Format |
| XXX file extension | Compucon USA | Compucon/Singer PSW Embroidery Design Format |
| XY file extension | XyQuest | XyWrite Document |
| XY3 file extension | N/A | XYWrite III Document |
| XYP file extension | N/A | XY Write III Plus Document |
| XYS file extension | Donald Lessau | XYplorer Script Format |
| XYW file extension | N/A | XYWrite For Windows 3x/4.0 Document |
| XYZ file extension | N/A | Molecule Specification Format |
| XYZE file extension | N/A | Radiance Map |
| XYZI file extension | N/A | 3rdTech Scanner |
| XYZRGB file extension | N/A | 3rdTech XYZ RGB Graphic |
| XYZV file extension | Celestia Development Team | Celestia Sampled Trajectory Format |
| XZ file extension | Tukaani | XZ Utils Compressed Archive |
| XZFX file extension | ZipLogix | ZipLogix ZipForm Format |
| XZM file extension | Slackware Linux, Inc. | Slackware Linux Package |
| X_B file extension | Siemens PLM Software | Parasolid Document Format |
| X_T file extension | Siemens PLM Software | Parasolid File Format |
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