Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.XHTML
File Type
eXtensible HyperText Markup Language
Category
Programming
Best first step
Use compatible software
Quick Summary
A practical overview of the .xhtml file format
XHTML (eXtensible HyperText Markup Language) is a markup language that is a reformulation of HTML 4 as an XML application. This means that XHTML documents must adhere to the stricter syntax rules of XML, unlike HTML which is more forgiving. The primary goal of XHTML was to bridge the gap between HT…
File extension
.XHTML
File type
eXtensible HyperText Markup Language
Category
Programming
Recommended action
Open with a trusted compatible app
How to open a .xhtml file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .xhtml.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .xhtml file?
File extension details and usage information
XHTML (eXtensible HyperText Markup Language) is a markup language that is a reformulation of HTML 4 as an XML application. This means that XHTML documents must adhere to the stricter syntax rules of XML, unlike HTML which is more forgiving. The primary goal of XHTML was to bridge the gap between HTML and XML, making web content more structured, machine-readable, and easier to integrate with other XML-based technologies. Because it is an XML application, XHTML requires all tags to be properly nested, all tags to be closed, and attribute values to be quoted. It was intended to be the successor to HTML 4.01, offering better integration with future web standards and devices. While modern web development primarily relies on HTML5, which incorporates many of the structural benefits of XML while retaining some of HTML's flexibility, XHTML remains relevant in specific contexts, particularly where strict XML compliance is required, such as in certain mobile device rendering environments or when integrating web content into XML data streams. It is essentially HTML written according to XML rules.
Software Compatibility
Programs that may open or work with .xhtml files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .xhtml files be converted?
Options for saving or exporting this file to another format
In many cases, a .xhtml file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .xhtml file.
Why can't I open a .xhtml file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .xhtml format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .xhtml files
To open a .xhtml file, use software that supports this file format.
- Google Chrome
- Mozilla Firefox
- Microsoft Edge
- Notepad++
- Safari
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .xhtml file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.