Sample Files
Details
XML
Extensible Markup Language
About
What is .XML?
.xml is a plain-text markup file format used to store structured data. XML defines custom tags to describe data hierarchically, making it ideal for configurations, documents, web services, and data exchange between applications.
History
Origin of XML
XML (Extensible Markup Language) was created by the World Wide Web Consortium (W3C) in the late 1990s as a flexible, structured markup language for encoding data in a human-readable and machine-readable format. Designed as a simplified subset of SGML, XML became widely used for configuration files, document formats, web services, office file formats, and data interchange. Many major standards—including SOAP, RSS, SVG, and Office Open XML—are built on top of XML.
Learn more at: https://www.w3.org/XML/
Benefits
Highly structured and human-readable
Supports custom tags for flexible data modeling
Widely used for system configuration and data interchange
Supports validation through XSD schemas and DTDs
Extensible and platform-independent
Machine-readable and language-neutral
Usage
Open XML files using a text editor or an IDE with syntax highlighting
Validate XML against DTD or XSD schemas for structural correctness
Parse or generate XML using languages like Python, Java, C#, or JavaScript
Convert XML to JSON, CSV, or other formats using transformation tools
Use XSLT to transform XML documents into HTML or other XML structures
Use Cases
Common Use Cases
Here are the use cases for this file extension
Configuration Files
Applications and frameworks often use XML to store settings, mappings, and structured configuration.
Web Services & APIs
XML is foundational to protocols like SOAP, RSS, and early web-service architectures.
Document Formats
Many file formats—such as DOCX, XLSX, SVG—use XML internally for data representation.
Compatibility
Supported By
This extension is compatible with the following platforms.
Windows
macOS
Linux
Android (as config or data files)
iOS (as config or data files)
Web Browsers (XML viewers and parsers)
More Details
Technical Specs
Here are some technical details about this extension
File Extension
.xml
MIME Type
application/xml
Encoding
UTF-8, UTF-16, or other Unicode encodings
Structure
Hierarchical tree-based markup using elements, attributes, and nested tags
Schema Support
XSD, DTD, Relax NG
Metadata Support
Yes (namespaces, attributes, declarations)
Typical Use
Configurations, data exchange, web services, structured documents
Related
You May Also Like
Here are some related extensions
Got Questions?
Get answers to common questions
You can validate XML using an XSD schema or a DTD. Many code editors and IDEs provide built-in validators.