The following tables display file extensions associated with web files, with extensions for the most commonly encountered file formats listed first:
| File Extension |
File Description |
| .asp |
Active Server Page
Open with any web browser. |
| .css |
Cascading Style Sheet
Used by HTML pages, but editable with any text editor. |
| .htm |
HTML File
The language in which Web documents are authored.
This file type requires a web browser, such as Internet Explorer,
Safari or Mozilla Firefox for viewing. Can be edited using a text
editor or Web development program. |
| .html |
Hypertext Markup Language
The language in which Web documents are authored.
This file type requires a web browser, such as Internet Explorer,
Safari or Mozilla Firefox for viewing. Can be edited using a text
editor or Web development program. |
| .js |
JavaScript File
Can be edited using any text editor. A web browser can compile
and run the JavaScript code.
|
| .jsp |
Java Server Page
This file type requires a web browser, such as Internet Explorer,
Safari or Mozilla Firefox for viewing. Can be edited using a text
editor or Web development program. |
| .php |
Hypertext Preprocessor File
Can be opened using a web server with a PHP engine installed, or
can be edited using a basic text editor. |
| .xhtml |
Extensible Hypertext Markup Language
Can be viewed using any web browser. |
| File Extension |
File Description |
| .adr |
Opera Bookmarks File |
| .asmx |
Active Server Method File |
| .aspx |
Active Server Page Extended |
| .atom |
Atom Syndication Format |
| .cdf |
Channel Definition Format |
| .cer |
Internet Security Certificate |
| .cfm |
ColdFusion Markup File |
| .cha |
Online Chat Configuration File |
| .chat |
Online Chat Configuration File |
| .chm |
Compiled HTML Help File |
| .cms |
Content Management System |
| .crt |
Security Certificate |
| .do |
Java Servlet |
| .download |
Partially Downloaded File |
| .dwt |
Dreamweaver Web Page Template |
| .hdml |
Handheld Markup Language |
| .htx |
HTML Extension File |
| .iqy |
Internet Query |
| .jcz |
Liquid Motion Animation |
| .jspx |
XML Java Server Page |
| .jvs |
JavaScript Proxy Autoconfig File |
| .moz |
Mozilla Cache File |
| .oth |
OpenDocument HTML Template |
| .p12 |
Personal Information Exchange |
| .pem |
Privacy Enhanced Mail Certificate |
| .php3 |
PHP 3 Script |
| .php4 |
PHP 4 Script |
| .php5 |
PHP 5 Script |
| .phtm |
PHP Web Page |
| .phtml |
PHP Web Page |
| .rss |
Rich Site Summary |
| .rwp |
RapidWeaver Package |
| .sht |
HTML File with Server Side Includes |
| .shtm |
HTML File that uses Server Side Includes |
| .shtml |
HTML File that uses Server Side Includes |
| .site |
Adobe GoLive Website Project |
| .svr |
Compressed Virtual World |
| .torrent |
BitTorrent File |
| .url |
Internet Shortcut |
| .vrml |
Virtual Reality Modeling Language File |
| .webarchive |
Safari Web Archive |
| .webloc |
Website Location |
| .wml |
Wireless Markup Language |
| .wrf |
WebEx Recording |
