.XHTML File

The xhtml file extension is generally reserved for files written in the Extensible HTML language.

XHTML is a family of current and future document types and modules that reproduce, subset, and extend HTML 4. These document types are XML based, and ultimately are designed to work in conjunction with XML-based user agents. As such, they are readily viewed, edited, and validated with standard XML tools.

XHTML documents can be written to operate as well or better than they did before in existing HTML 4-conforming user agents as well as in new, XHTML 1.0 conforming user agents. These can also utilize applications (e.g. scripts and applets) that rely upon either the HTML Document Object Model or the XML Document Object Model.

As the XHTML family evolves, documents conforming to XHTML 1.0 will be more likely to interoperate within and among various XHTML environments.

MIME types:
application/xhtml+xml

An xhtml file extension is associated with the Extensible HTML language used to extend HTML 4. An xhtml file stores document written in the XHTML.

How to open:

You can open and edit *.xhtml files in any text editor or you can try one of the many specialised programs (Adobe Contribute, Dreamweaver).Also, any web browser (Firefox, Opera, Chrome, Internet Explorer) can view files in XHTML format as pages.

How to convert:

You can search the web for some XHTML converters or simply copy and paste from browser into any text editor capable to convert XHTML tags into its document file format (eg. Microsoft Word). You can also export print/save webpage into .pdf file using some PDF software solution (Adobe Acrobat, FinePrint etc.).