| File extension |
File description |
Developer/Producer |
| .a4p |
A4Desk Pro Project File |
Avanquest Software |
| .a5w |
Alpha Five Webpage File |
Alpha Software |
| .adr |
Opera Bookmarks File |
N/A |
| .aex |
Alpha Five Compiled Global Functions File |
Alpha Software |
| .alx |
ActiveX Layout Control File |
Microsoft |
| .an |
Adobe Edge Animate Project File |
Adobe Systems |
| .ap |
Active Page |
Fifth Generation Systems |
| .aro |
SteelArrow Web Application File |
Tomahawk Technologies |
| .asa |
ASP Configuration File |
N/A |
| .asax |
ASP.NET Server Application File |
Microsoft |
| .ascx |
ASP.NET User Control File |
Microsoft |
| .ashx |
ASP.NET Web Handler File |
Microsoft |
| .asmx |
ASP.NET Web Service File |
Microsoft |
| .asp |
Active Server Page |
Microsoft |
| .aspx |
Active Server Page Extended File |
Microsoft |
| .asr |
ActionScript Remote Document |
Adobe Systems |
| .atom |
Atom Syndication Format |
N/A |
| .att |
Web Form Post Data File |
N/A |
| .awm |
AllWebMenus Project File |
Likno Software |
| .axd |
ASP.NET Web Handler File |
Microsoft |
| .bml |
Bean Markup Language File |
N/A |
| .bok |
ProStores Dynamic Web Page |
eBay |
| .browser |
ASP.NET Browser Definition File |
Microsoft |
| .btapp |
uTorrent App |
BitTorrent |
| .bwp |
BuRg3r Web Page |
Fluffy Smoke Entertainment |
| .cdf |
Channel Definition Format |
N/A |
| .cer |
Internet Security Certificate |
N/A |
| .cfm |
ColdFusion Markup File |
Adobe Systems |
| .cfml |
ColdFusion Markup Language File |
Adobe Systems |
| .cha |
IRC Chat Configuration File |
N/A |
| .chat |
IRC Chat Configuration File |
N/A |
| .chm |
Compiled HTML Help File |
Microsoft |
| .cms |
Content Management System |
N/A |
| .codasite |
Coda Site File |
Panic |
| .compressed |
WordCompress Compacted Web File |
WordCompress |
| .con |
Concept Application Source File |
RadGs |
| .cpg |
Cool Page Project File |
3Dize |
| .crl |
Certificate Revocation List File |
N/A |
| .crt |
Security Certificate |
N/A |
| .cshtml |
ASP.NET Razor Web Page |
Microsoft |
| .csp |
Concept Server Page |
RadGs |
| .csr |
Certificate Signing Request File |
N/A |
| .css |
Cascading Style Sheet |
N/A |
| .dap |
Access Data Access Page |
Microsoft |
| .dbm |
ColdFusion Server File |
Adobe Systems |
| .dcr |
Shockwave Media File |
Adobe Systems |
| .der |
DER Certificate File |
N/A |
| .dhtml |
Dynamic HTML file |
N/A |
| .disco |
DISCO Discovery Document |
Microsoft |
| .discomap |
DISCO Discovery Output File |
Microsoft |
| .dll |
DLL Dynamic Web Page |
N/A |
| .dml |
DynaScript File |
Dynascript Technologies |
| .do |
Java Servlet |
N/A |
| .dochtml |
Microsoft Word HTML Document |
Microsoft |
| .docmhtml |
Microsoft Word MIME HTML Document |
Microsoft |
| .dothtml |
Microsoft Word HTML Document Template |
Microsoft |
| .download |
Partially Downloaded File |
N/A |
| .dwt |
Dreamweaver Web Page Template |
Adobe Systems |
| .ece |
Escenic Dynamic Web Page |
Escenic |
| .edge |
Adobe Edge Project File |
Adobe Systems |
| .epibrw |
Web File Location |
N/A |
| .esproj |
Espresso Project File |
MacRabbit |
| .ewp |
Ewisoft Website Project File |
Ewisoft |
| .fcgi |
FastCGI File |
FastCGI |
| .fmp |
123 Flash Menu Project |
Dreamingsoft |
| .fwp |
Microsoft Expression Web Package |
Microsoft |
| .gne |
Flickr Web Page |
Ludicorp |
| .gsp |
IMail Error Message File |
Ipswitch |
| .hdm |
HDML File |
Openwave |
| .hdml |
Handheld Device Markup Language File |
Openwave |
| .htaccess |
Apache HTACCESS File |
N/A |
| .htc |
HTML Component File |
Microsoft |
| .htm |
Hypertext Markup Language File |
N/A |
| .html |
Hypertext Markup Language File |
N/A |
| .htx |
HTML Extension File |
Microsoft |
| .hxs |
Help 2 Compiled Help File |
Microsoft |
| .hype |
Hype Document |
Tumult |
| .idc |
Internet Database Connector File |
Microsoft |
| .iqy |
Internet Query |
Microsoft |
| .itms |
iTunes Music Store Link File |
Apple |
| .itpc |
iTunes Podcast Link File |
Apple |
| .iwdgt |
iWeb Widget File |
Apple |
| .jcz |
Liquid Motion Animation |
Microsoft |
| .jhtml |
Java HTML Web Page |
N/A |
| .jnlp |
Java Web Start File |
Oracle |
| .js |
JavaScript File |
N/A |
| .json |
JavaScript Object Notation File |
N/A |
| .jsp |
Java Server Page |
Oracle |
| .jspa |
Java Servlet Alias |
N/A |
| .jspx |
XML Java Server Page |
N/A |
| .jss |
JavaScript Style Sheet File |
JSS |
| .jst |
JavaServer Page Document |
Oracle |
| .jvs |
JavaScript Proxy Autoconfig File |
N/A |
| .jws |
Java Web Services File |
BEA Systems |
| .lasso |
Lasso Database-Driven Web Page |
LassoSoft |
| .lbc |
Cloaked Affiliate Link Builder Saved Link |
Curry K. Software |
| .less |
LESS Style Sheet |
Alexis Sellier |
| .maff |
Mozilla Archive Format File |
Mozilla |
| .map |
Image Map |
N/A |
| .mapx |
Mapjects Client Webparts File |
Mapjects Development |
| .master |
ASP.NET Master Page |
Microsoft |
| .mht |
MHTML Web Archive |
N/A |
| .mhtml |
MIME HTML File |
N/A |
| .moz |
Mozilla Cache File |
N/A |
| .mspx |
Microsoft ASP.NET Web Page |
Microsoft |
| .muse |
Adobe Muse Website Project |
Adobe Systems |
| .mvc |
MivaScript Compiled File |
Miva Merchant |
| .mvr |
IBM HotMedia Multimedia File |
IBM |
| .nod |
NetObjects Fusion File |
NetObjects |
| .nxg |
eSite Builder NXG Web Page |
Motorola |
| .nzb |
NewzBin Usenet Index File |
NewzBin.com |
| .oam |
Adobe Edge Animate Widget File |
Adobe Systems |
| .obml |
Opera Mini Saved Web Page |
Opera Software |
| .ognc |
Dynamic Web Page |
N/A |
| .opml |
Outline Processor Markup Language File |
N/A |
| .oth |
OpenDocument HTML Template |
OASIS |
| .p12 |
Personal Information Exchange File |
RSA Laboratories |
| .p7 |
PKCS #7 Digital Certificate File |
N/A |
| .p7b |
PKCS #7 Certificate File |
N/A |
| .p7c |
PKCS #7 Certificate File |
N/A |
| .pac |
Proxy Auto-Config File |
Netscape |
| .page |
HybridJava Web Page |
HybridServerPages Group |
| .pem |
Privacy Enhanced Mail Certificate |
N/A |
| .php |
PHP Source Code File |
N/A |
| .php3 |
PHP 3 Web Page |
N/A |
| .php4 |
PHP 4 Web Page |
N/A |
| .php5 |
PHP 5 Web Page |
N/A |
| .phtm |
PHP-Based Web Page |
N/A |
| .phtml |
PHP Web Page |
N/A |
| .ppthtml |
PowerPoint HTML Presentation |
Microsoft |
| .pptmhtml |
Microsoft PowerPoint MIME HTML Presentation |
Microsoft |
| .prf |
PICS Rules File |
W3C |
| .pro |
Adobe Proto Design File |
Adobe Systems |
| .psp |
PL/SQL Server Page |
Oracle |
| .ptw |
AutoCAD Publish To Web File |
Autodesk |
| .pub |
Public Key File |
N/A |
| .qbo |
QuickBooks Online Bank Statement File |
Intuit |
| .qf |
Qompose Web Page Template |
Qompose |
| .qrm |
Qworum Message File |
Qworum |
| .rhtml |
Ruby HTML Web Page |
N/A |
| .rjs |
Ruby Javascript File |
N/A |
| .rss |
Rich Site Summary |
N/A |
| .rt |
RealText Streaming Text File |
RealNetworks |
| .rw3 |
RapidWeaver 3 Site File |
Realmac Software |
| .rwp |
RapidWeaver Package |
Realmac Software |
| .rwsw |
RapidWeaver Site File |
Realmac Software |
| .rwtheme |
RapidWeaver Theme |
Realmac Software |
| .saveddeck |
Nokia Saved Web Page |
Nokia |
| .sdb |
SocialDecks Blog File |
SocialDecks |
| .seam |
Seam Framework Java Servlet File |
JBoss |
| .sht |
HTML File with Server Side Includes |
N/A |
| .shtm |
HTML Server Side Include File |
N/A |
| .shtml |
Server Side Include HTML File |
N/A |
| .site |
GoLive Website Project File |
Adobe Systems |
| .sitemap |
ASP.NET Site Map File |
Microsoft |
| .sites |
iWeb Site Design Project |
Apple |
| .sites2 |
iWeb Site Design Project |
Apple |
| .spc |
Software Publisher Certificate File |
N/A |
| .srf |
Server Response File |
Microsoft |
| .ssp |
Scala Server Page |
Scalate |
| .stc |
Contribute Connection Key File |
Adobe Systems |
| .stl |
Certificate Trust List |
Microsoft |
| .stm |
SSI Web Page |
N/A |
| .stml |
SSI HTML File |
N/A |
| .stp |
SharePoint Template |
Microsoft |
| .suck |
SiteSucker Website File |
SiteSucker |
| .svc |
WCF Web Service File |
Microsoft |
| .svr |
Compressed Virtual World |
Superscape |
| .swz |
Adobe Flash Player Cache File |
Adobe Systems |
| .tvpi |
TitanTV Television Listing File |
Decisionmark |
| .tvvi |
TitanTV Television Listing File |
Decisionmark |
| .ucf |
WebEx Media File |
Cisco Systems |
| .uhtml |
UC Browser Saved Webpage |
UC Mobile |
| .url |
Internet Shortcut |
N/A |
| .vbd |
Visual Basic ActiveX Document |
Microsoft |
| .vbhtml |
ASP.NET Razor Web Page |
Microsoft |
| .vdw |
Visio Web Drawing |
Microsoft |
| .vlp |
LiveSite Project |
Valadeo |
| .vrml |
VRML File |
N/A |
| .vsdisco |
DISCO Dynamic Discovery Document |
Microsoft |
| .wbxml |
WAP Binary XML File |
Open Mobile Alliance |
| .wdgt |
Opera Widget |
N/A |
| .web |
Xara Web Document |
MAGIX |
| .webarchive |
Safari Web Archive |
Apple |
| .webarchivexml |
Android Web Browser Archive |
Google |
| .webbookmark |
Safari Web Bookmark File |
Apple |
| .webhistory |
Safari Web History File |
Apple |
| .webloc |
Mac OS X Website Location |
Apple |
| .website |
Internet Explorer Pinned Site Shortcut |
Microsoft |
| .wgp |
Web Gallery Project |
WebHat |
| .wgt |
Opera Widget File |
Opera Software |
| .whtt |
HTTrack Website Copier File |
Xavier Roche |
| .widget |
HybridJava Widget |
HybridServerPages Group |
| .wml |
Wireless Markup Language File |
N/A |
| .wn |
WN Web File |
WN |
| .woa |
WebObjects Application |
Apple |
| .wpp |
WebPlus Project File |
Serif |
| .wpx |
WebPlus Project Template |
Seif |
| .wrf |
WebEx Recording |
Cisco Systems |
| .wsdl |
Web Services Description Language File |
W3C |
| .xbel |
XBEL Bookmarks File |
Python XML SIG |
| .xbl |
Extensible Binding Language File |
Mozilla |
| .xfdl |
XFDL File |
UWI |
| .xht |
XHTML File |
N/A |
| .xhtm |
Extensible Hypertext Markup Language Document |
N/A |
| .xhtml |
Extensible Hypertext Markup Language File |
N/A |
| .xpd |
XML Pipeline Document |
N/A |
| .xss |
XML Style Sheet |
Oracle |
| .xul |
XML User Interface Language File |
Mozilla |
| .xws |
Xara Web Designer Graphic |
MAGIX |
| .zfo |
XSL-FO Online Form |
N/A |
| .zhtml |
Secure IE Zipped HTML File |
Winferno Software |
| .zul |
ZK User Interface File |
Potix |
| .zvz |
Possible Virus File |
N/A |
