XHTML (eXtensible HyperText Markup Language) is a markup language that is a reformulation of HTML 4 as an XML applicatio...
XIB files are XML-based files used within Apple's Xcode integrated development environment (IDE) to define the user inte...
XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML docume...
Categories are organized by file type purpose: Documents, Images, Audio, Video, Archives, Executables, Data files, and Programming files.
Yes, use the alphabetic filter buttons to quickly find extensions starting with specific letters.
Each extension page includes software compatibility, file descriptions, alternatives, and usage information.