.XHT File Extension
What is an XHT file?
Web file written in XHTML, the Extensible Hypertext Markup Language; similar to a .HTML file, but is based on the more strict .XML syntax; allows for a more consistent representation of Web pages across multiple browsers.
More Information
XHTML files also use the .XHTML extension.
Programs that open XHT files
Mac
Any Web browser
Windows
Any Web browser