XHTML (Extensible Hypertext Markup Language File)

The XHTML Website file format

Files saved with the XHTML extension are website files written in a certain programming language. The contents of the file are written in XHTML which is an extended version of HTML 4, thus creating XML 1.0 applications. Many up-to-date websites consist of code written in XHTML 1.0 or XHTML 1.1 as opposed to plain HTML nowadays.

Technical details of XHTML files

Files written in the XHTML markup language use standard HTML tags. However, the more strict XML guidelines apply to the XHTML code as opposed to pure HTML code. Due to this, XHTML files are very well-formed and can easily be parsed using XML. Since January 2000, the XHTML programming language became a W3C Recommendation.

More information about the XHTML file format

File extension .xhtml
File category Website
Example file Download example.xhtml file (133.81 KiB)
Associated programs Adobe ColdFusion Builder 3
Adobe Dreamweaver CC 2015
Apple Safari
Microsoft Internet Explorer
Mozilla Firefox

And other web browsers.
Useful links Get more information about the XHTML language & files
Developer n/a