Input
Output
Formatted XML will appear here…
Frequently asked questions
What is XML?
XML (eXtensible Markup Language) is a text format for storing and transporting structured data. Unlike HTML, XML has no predefined tags — you define your own. It is widely used in enterprise systems, SOAP APIs, RSS/Atom feeds, SVG graphics, and Android layouts.
Why format XML?
Raw XML from APIs or files is often minified into a single long line. Formatting adds indentation so you can see the tree structure, making it much easier to find tags, attributes, and values when debugging.
What is XML validation?
XML validation checks that the document is well-formed — every opening tag has a closing tag, attributes are properly quoted, special characters are escaped, and the document has exactly one root element. Malformed XML will fail to parse in any XML library.
What is the difference between XML and JSON?
XML uses opening and closing tags and supports attributes, comments, and namespaces. JSON uses braces and brackets and is more compact. JSON has largely replaced XML for web APIs, but XML remains dominant in enterprise integrations, document formats (DOCX, XLSX), and configuration systems.