List of Web file extensions

There are many different web file extensions and web file types used with computers, and you'll find an entire list of web file extensions and types on our computer files and file extensions page. It is impossible to remember all file extensions and their associated software programs. Below is the list of web file extensions, broken into categories by sort of files along with the developer and available 100% free online web file tools and apps.

Extension File Type Developer Free Apps
.A4P A4Desk Pro Project File Avanquest Software Free A4P Apps
.A5W Alpha Five Webpage File Alpha Software Free A5W Apps
.ADR Opera Bookmarks File Not Available Free ADR Apps
.AEX Alpha Five Compiled Global Functions File Alpha Software Free AEX Apps
.ALX ActiveX Layout Control File Microsoft Free ALX Apps
.AN Adobe Edge Animate Project File Adobe Free AN Apps
.AP Active Page Fifth Generation Systems Free AP Apps
.APPCACHE HTML5 Cache Manifest File Not Available Free APPCACHE Apps
.ARO SteelArrow Web Application File Tomahawk Technologies Free ARO Apps
.ASA ASP Configuration File Not Available Free ASA Apps
.ASAX ASP.NET Server Application File Microsoft Free ASAX Apps
.ASCX ASP.NET User Control File Microsoft Free ASCX Apps
.ASHX ASP.NET Web Handler File Microsoft Free ASHX Apps
.ASMX ASP.NET Web Service File Microsoft Free ASMX Apps
.ASR ActionScript Remote Document Adobe Free ASR Apps
.ATOM Atom Syndication Format Not Available Free ATOM Apps
.ATT Web Form Post Data File Not Available Free ATT Apps
.AWM AllWebMenus Project File Likno Software Free AWM Apps
.AXD ASP.NET Web Handler File Microsoft Free AXD Apps
.BML Bean Markup Language File Not Available Free BML Apps
.BOK ProStores Dynamic Web Page eBay Free BOK Apps
.BR Brotli Compressed File Not Available Free BR Apps
.BROWSER ASP.NET Browser Definition File Microsoft Free BROWSER Apps
.BTAPP uTorrent App BitTorrent Free BTAPP Apps
.BWP BuRg3r Web Page Fluffy Smoke Entertainment Free BWP Apps
.CCBJS CopperCube JavaScript File Ambiera Free CCBJS Apps
.CDF Channel Definition Format Not Available Free CDF Apps
.CFML ColdFusion Markup Language File Adobe Free CFML Apps
.CHA IRC Chat Configuration File Not Available Free CHA Apps
.CHAT IRC Chat Configuration File Not Available Free CHAT Apps
.CHM Compiled HTML Help File Microsoft Free CHM Apps
.CMS Content Management System Not Available Free CMS Apps
.CODASITE Coda Site File Panic Free CODASITE Apps
.COMPRESSED WordCompress Compacted Web File WordCompress Free COMPRESSED Apps
.CON Concept Application Source File RadGs Free CON Apps
.CPG Cool Page Project File 3Dize Free CPG Apps
.CPHD CloudChan Pre-processed Hypertext Document CloudChan Free CPHD Apps
.CRL Certificate Revocation List File Not Available Free CRL Apps
.CRT Security Certificate Not Available Free CRT Apps
.CSHTML ASP.NET Razor Web Page Microsoft Free CSHTML Apps
.CSP Concept Server Page RadGs Free CSP Apps
.DAP Access Data Access Page Microsoft Free DAP Apps
.DBM ColdFusion Server File Adobe Free DBM Apps
.DER DER Certificate File Not Available Free DER Apps
.DHTML Dynamic HTML file Not Available Free DHTML Apps
.DISCO DISCO Discovery Document Microsoft Free DISCO Apps
.DISCOMAP DISCO Discovery Output File Microsoft Free DISCOMAP Apps
.DLL DLL Dynamic Web Page Not Available Free DLL Apps
.DML DynaScript File Dynascript Technologies Free DML Apps
.DO Java Servlet Not Available Free DO Apps
.DOCHTML Microsoft Word HTML Document Microsoft Free DOCHTML Apps
.DOCMHTML Microsoft Word MIME HTML Document Microsoft Free DOCMHTML Apps
.DOTHTML Microsoft Word HTML Document Template Microsoft Free DOTHTML Apps
.DOWNLOAD Partially Downloaded File Not Available Free DOWNLOAD Apps
.DWT Dreamweaver Webpage Template Adobe Free DWT Apps
.ECE Escenic Dynamic Web Page Escenic Free ECE Apps
.EDGE Adobe Edge Project File Adobe Free EDGE Apps
.EPIBRW Web File Location Not Available Free EPIBRW Apps
.ESPROJ Espresso Project File MacRabbit Free ESPROJ Apps
.EWP Ewisoft Website Project File Ewisoft Free EWP Apps
.FCGI FastCGI File FastCGI Free FCGI Apps
.FMP 123 Flash Menu Project Dreamingsoft Free FMP Apps
.FREEWAY Freeway Document Softpress Free FREEWAY Apps
.FWP Microsoft Expression Web Package Microsoft Free FWP Apps
.FWTB Freeway Template Bundle Softpress Free FWTB Apps
.FWTEMPLATE Freeway Template Softpress Free FWTEMPLATE Apps
.FWTEMPLATEB Freeway Template Bundle Softpress Free FWTEMPLATEB Apps
.GNE Flickr Web Page Ludicorp Free GNE Apps
.GSP IMail Error Message File Ipswitch Free GSP Apps
.GSP Groovy Server Page Object Computing Inc Free GSP Apps
.HAR HTTP Archive FIle World Wide Web Consortium Free HAR Apps
.HDM HDML File Openwave Free HDM Apps
.HDML Handheld Device Markup Language File Openwave Free HDML Apps
.HTACCESS Apache HTACCESS File Not Available Free HTACCESS Apps
.HTC HTML Component File Microsoft Free HTC Apps
.HTX HTML Extension File Microsoft Free HTX Apps
.HXS Help 2 Compiled Help File Microsoft Free HXS Apps
.HYPE Hype Document Tumult Free HYPE Apps
.HYPERESOURCES Hype Resources Folder Tumult Free HYPERESOURCES Apps
.HYPESYMBOL Hype Symbol File Tumult Free HYPESYMBOL Apps
.HYPETEMPLATE Hype Document Template Tumult Free HYPETEMPLATE Apps
.IDC Internet Database Connector File Microsoft Free IDC Apps
.IQY Internet Query Microsoft Free IQY Apps
.ITMS iTunes Music Store Link File Apple Free ITMS Apps
.ITPC iTunes Podcast Link File Apple Free ITPC Apps
.IWDGT iWeb Widget File Apple Free IWDGT Apps
.JCZ Liquid Motion Animation Microsoft Free JCZ Apps
.JHTML Java HTML Web Page Not Available Free JHTML Apps
.JNLP Java Web Start File Oracle Free JNLP Apps
.JSON JavaScript Object Notation File Not Available Free JSON Apps
.JSPA Java Servlet Alias Not Available Free JSPA Apps
.JSPX XML Java Server Page Not Available Free JSPX Apps
.JSS JavaScript Style Sheet File JSS Free JSS Apps
.JST JavaServer Page Document Oracle Free JST Apps
.JVS JavaScript Proxy Autoconfig File Not Available Free JVS Apps
.JWS Java Web Services File BEA Systems Free JWS Apps
.KIT CodeKit File Not Available Free KIT Apps
.LASSO Lasso Database-Driven Web Page LassoSoft Free LASSO Apps
.LBC Cloaked Affiliate Link Builder Saved Link Curry K Software Free LBC Apps
.LESS LESS Style Sheet Alexis Sellier Free LESS Apps
.MAFF Mozilla Archive Format File Mozilla Free MAFF Apps
.MAP Image Map Not Available Free MAP Apps
.MAPX Mapjects Client Webparts File Mapjects Development Free MAPX Apps
.MASTER ASP.NET Master Page Microsoft Free MASTER Apps
.MHT MHTML Web Archive Not Available Free MHT Apps
.MHTML MIME HTML File Not Available Free MHTML Apps
.MJS Node.js ES Module File Not Available Free MJS Apps
.MOZ Mozilla Cache File Not Available Free MOZ Apps
.MSPX Microsoft ASP.NET Web Page Microsoft Free MSPX Apps
.MUSE Adobe Muse Website Project Adobe Free MUSE Apps
.MVC MivaScript Compiled File Miva Merchant Free MVC Apps
.MVR IBM HotMedia Multimedia File IBM Free MVR Apps
.NOD NetObjects Fusion File NetObjects Free NOD Apps
.NODE Node.js Binary Addon File Not Available Free NODE Apps
.NXG eSite Builder NXG Web Page Motorola Free NXG Apps
.NZB NewzBin Usenet Index File NewzBin com Free NZB Apps
.OAM Adobe Edge Animate Widget File Adobe Free OAM Apps
.OBML Opera Mini Saved Web Page Opera Software Free OBML Apps
.OBML15 Opera Mini Saved Web Page Opera Software Free OBML15 Apps
.OBML16 Opera Mini Saved Web Page Opera Software Free OBML16 Apps
.OGNC Dynamic Web Page Not Available Free OGNC Apps
.OLP Office Live Package Microsoft Free OLP Apps
.OPML Outline Processor Markup Language File The Omni Group Free OPML Apps
.OTH OpenDocument HTML Template OASIS Free OTH Apps
.P12 Personal Information Exchange File RSA Laboratories Free P12 Apps
.P7 PKCS #7 Digital Certificate File Not Available Free P7 Apps
.P7B PKCS #7 Certificate File Not Available Free P7B Apps
.P7C PKCS #7 Certificate File Not Available Free P7C Apps
.PAC Proxy Auto-Config File Netscape Free PAC Apps
.PAGE HybridJava Web Page HybridServerPages Group Free PAGE Apps
.PEM Privacy Enhanced Mail Certificate Not Available Free PEM Apps
.PHP2 PHP 2 Web Page Not Available Free PHP2 Apps
.PHP3 PHP 3 Web Page Not Available Free PHP3 Apps
.PHP4 PHP 4 Web Page Not Available Free PHP4 Apps
.PHP5 PHP 5 Web Page Not Available Free PHP5 Apps
.PHTM PHP-Based Web Page Not Available Free PHTM Apps
.PHTML PHP Web Page Not Available Free PHTML Apps
.PPTHTML PowerPoint HTML Presentation Microsoft Free PPTHTML Apps
.PPTMHTML Microsoft PowerPoint MIME HTML Presentation Microsoft Free PPTMHTML Apps
.PRF PICS Rules File W3C Free PRF Apps
.PRO Adobe Proto Design File Adobe Free PRO Apps
.PSP PL/SQL Server Page Oracle Free PSP Apps
.PTW AutoCAD Publish To Web File Autodesk Free PTW Apps
.PUB Public Key File Not Available Free PUB Apps
.QBO QuickBooks Online Bank Statement File Intuit Free QBO Apps
.QBX Blocks Landing Page File Samuel Services Free QBX Apps
.QF Qompose Web Page Template Qompose Free QF Apps
.QRM Qworum Message File Qworum Free QRM Apps
.RFLW Edge Reflow Data File Adobe Free RFLW Apps
.RHTML Ruby HTML Web Page Not Available Free RHTML Apps
.RJS Ruby Javascript File Not Available Free RJS Apps
.RT RealText Streaming Text File RealNetworks Free RT Apps
.RW3 RapidWeaver 3 Site File Realmac Software Free RW3 Apps
.RWP RapidWeaver Package Realmac Software Free RWP Apps
.RWSW RapidWeaver Site File Realmac Software Free RWSW Apps
.RWTHEME RapidWeaver Theme Realmac Software Free RWTHEME Apps
.SASS Syntactically Awesome StyleSheets File Not Available Free SASS Apps
.SAVEDDECK Nokia Saved Web Page Nokia Free SAVEDDECK Apps
.SCSS Sass Cascading Style Sheet Not Available Free SCSS Apps
.SDB SocialDecks Blog File SocialDecks Free SDB Apps
.SEAM Seam Framework Java Servlet File JBoss Free SEAM Apps
.SHT HTML File with Server Side Includes Not Available Free SHT Apps
.SHTM HTML Server Side Include File Not Available Free SHTM Apps
.SHTML Server Side Include HTML File Not Available Free SHTML Apps
.SITE GoLive Website Project File Adobe Free SITE Apps
.SITEMAP ASP.NET Site Map File Microsoft Free SITEMAP Apps
.SITES iWeb Site Design Project Apple Free SITES Apps
.SITES2 iWeb Site Design Project Apple Free SITES2 Apps
.SPARKLE Sparkle Website Project River SRL Free SPARKLE Apps
.SPC Software Publisher Certificate File Not Available Free SPC Apps
.SRF Server Response File Microsoft Free SRF Apps
.SSP Scala Server Page Scalate Free SSP Apps
.STC Contribute Connection Key File Adobe Free STC Apps
.STL Certificate Trust List Microsoft Free STL Apps
.STM SSI Web Page Not Available Free STM Apps
.STML SSI HTML File Not Available Free STML Apps
.STP SharePoint Template Microsoft Free STP Apps
.STRM Stream Location File Not Available Free STRM Apps
.SUCK SiteSucker Website File SiteSucker Free SUCK Apps
.SVC WCF Web Service File Microsoft Free SVC Apps
.SVR Compressed Virtual World Superscape Free SVR Apps
.SWZ Adobe Flash Player Cache File Adobe Free SWZ Apps
.TPL HTTP File Server Template Not Available Free TPL Apps
.TVPI TitanTV Television Listing File Decisionmark Free TVPI Apps
.TVVI TitanTV Television Listing File Decisionmark Free TVVI Apps
.UCF WebEx Media File Cisco Systems Free UCF Apps
.UHTML UC Browser Saved Webpage UC Mobile Free UHTML Apps
.URL Internet Shortcut Not Available Free URL Apps
.VBD Visual Basic ActiveX Document Microsoft Free VBD Apps
.VBHTML ASP.NET Razor Web Page Microsoft Free VBHTML Apps
.VDW Visio Web Drawing Microsoft Free VDW Apps
.VLP LiveSite Project Valadeo Free VLP Apps
.VRML VRML File Not Available Free VRML Apps
.VRT Virtual World Superscape Free VRT Apps
.VSDISCO DISCO Dynamic Discovery Document Microsoft Free VSDISCO Apps
.WBS WebBlender Project File Tech4Learning Free WBS Apps
.WBXML WAP Binary XML File Open Mobile Alliance Free WBXML Apps
.WDGT Opera Widget Not Available Free WDGT Apps
.WEB Xara Web Document MAGIX Free WEB Apps
.WEBARCHIVE Safari Web Archive Apple Free WEBARCHIVE Apps
.WEBARCHIVEXML Android Web Browser Archive Google Free WEBARCHIVEXML Apps
.WEBBOOKMARK Safari Web Bookmark File Apple Free WEBBOOKMARK Apps
.WEBHISTORY Safari Web History File Apple Free WEBHISTORY Apps
.WEBLOC macOS Website Location Apple Free WEBLOC Apps
.WEBSITE Internet Explorer Pinned Site Shortcut Microsoft Free WEBSITE Apps
.WGP Web Gallery Project WebHat Free WGP Apps
.WGT Opera Widget File Opera Software Free WGT Apps
.WHTT HTTrack Website Copier File Xavier Roche Free WHTT Apps
.WIDGET HybridJava Widget HybridServerPages Group Free WIDGET Apps
.WML Wireless Markup Language File Not Available Free WML Apps
.WN WN Web File WN Free WN Apps
.WOA WebObjects Application Apple Free WOA Apps
.WPP WebPlus Project File Serif Free WPP Apps
.WPX WebPlus Project Template Seif Free WPX Apps
.WRF WebEx Recording Cisco Systems Free WRF Apps
.WSDL Web Services Description Language File W3C Free WSDL Apps
.XBEL XBEL Bookmarks File Python XML SIG Free XBEL Apps
.XBL Extensible Binding Language File Mozilla Free XBL Apps
.XFDL XFDL File UWI Free XFDL Apps
.XHT XHTML File Not Available Free XHT Apps
.XHTM Extensible Hypertext Markup Language Document Not Available Free XHTM Apps
.XPD XML Pipeline Document Not Available Free XPD Apps
.XSS XML Style Sheet Oracle Free XSS Apps
.XUL XML User Interface Language File Mozilla Free XUL Apps
.XWS Xara Web Designer Graphic MAGIX Free XWS Apps
.ZFO XSL-FO Online Form Not Available Free ZFO Apps
.ZHTML Secure IE Zipped HTML File Winferno Software Free ZHTML Apps
.ZHTML RabbitWeb Webpage Digi International Free ZHTML Apps
.ZUL ZK User Interface File Potix Free ZUL Apps
.ZVZ Possible Virus File Not Available Free ZVZ Apps
Extension File Type Developer Free Apps