Kinds of XHTML Files

Dominant XHTML File Type

.XHTML

File Name:	.xhtml
Group:	Extensible Hypertext Markup Language Document

An XHTML file is a web page file written in XHTML, a reformulation of HTML 4 that uses XML 1.0. It includes standard HTML tags, which must adhere to more strict XML guidelines and is used for publishing website content. Most of these files often use the XHTML extension.

Author:	Opera Software
Group:	Web Files
Subkey:	HKEY_CLASSES_ROOT\.xhtml

Software Programs That Open The Extensible Hypertext Markup Language Document:

Internet Explorer by Microsoft Corporation

Windows

Mac

Mozilla Firefox by Mozilla

Windows

	Mac
	iOS

Android

Linux

Solaris

illumos

Google Chrome by Google

Windows

	Mac
	iOS

Android

Linux

Opera by Opera Software

Windows

	Mac
	iOS

Android

Linux

Adobe Dreamweaver by Adobe Systems Incorporated

Windows

Mac

Apple Safari by Apple

Windows

	Mac
	iOS

Android

Linux

Solaris

illumos

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Troubleshooting Problems Opening XHTML Files

Typical XHTML Opening Challenges

Internet Explorer is Not Installed

When you double-click your XHTML file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". If so, it typically means that you don't have Internet Explorer installed for - . The OS won't know what to do with your XHTML file, so double-clicking to load the file doesn't work.

Tip: If you know of another program that can open your XHTML file, you can try opening it by selecting the application from the programs listed.

Wrong Version of Internet Explorer is Installed

In other instances, your Extensible Hypertext Markup Language Document file version may not be supported by your version of Internet Explorer. If you do not have the proper version Internet Explorer (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. Most of the time your Extensible Hypertext Markup Language Document file was created by a newer Internet Explorer than what you have installed.

Tip: Investigate your XHTML file by right-clicking and selecting "Properties" to find clues on what version you need.

Summary: In either case, the majority of problems opening XHTML files are related to not having the correct software application installed on your computer.

Additional XHTML Opening Issues

Assuming you have the right Internet Explorer version installed, other problems can prevent you from opening XHTML files. There can be other issues - unrelated to software - preventing you from opening XHTML files. Problems unrelated to software:

• Invalid XHTML file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Unintentional removal of the description of the XHTML file inside the Windows Registry
• Corrupt install of Internet Explorer or other XHTML-related program
• File corruption affecting your XHTML file
• Past or present virus infection has affected your XHTML
• Device drivers for XHTML-related hardware are out-of-date
• Too many applications are open on your PC to load your Extensible Hypertext Markup Language Document file successfully