.XHTML File Extension

Extensible Hypertext Markup Language File

The XHTML file format uses HTML tags. But XHTML pages follow stricter XML guidelines than HTML pages. XHTML documents must parse using HTML parsers. The stricter guidelines make XHTML files well-forme...

General Information

Title XHTML File Extension
Extension .xhtml
Full Form Extensible Hypertext Markup Language File
File Type Markup Language File
Developer World Wide Web Consortium (W3C)
MIME Type application/xhtml+xml

File Function

Primary Function Webpage structure
Additional Functions Data presentation, Web standards compliance
Features Strict syntax, XML-compliant

File Characteristics

Quality High standards
Supports Layers No
Supports Transparency Via CSS
Editable Yes

Use Cases

Web Development Yes
Web Design Yes
Application Development Yes

Security and Practices

Security Risks Script injection
Best Practices Validation, Encoding

Historical/Version Information

Initial Release January 2000
Latest Version XHTML 5 (part of HTML5)

Associated Types

Similar Extensions .html, .htm, .xml

Software Compatibility

Software Usage Policy OS Compatibility
Web Browsers Free Windows, Mac, Linux, Mobile
Adobe Dreamweaver Subscription Windows, Mac
Microsoft Visual Studio Free, Paid editions Windows, Mac