XML Formatter & Validator
What is XML?
XML (eXtensible Markup Language) is a markup language for encoding documents in a format that is both human-readable and machine-readable. Defined by the W3C, XML has been a cornerstone of data interchange since the late 1990s.
While JSON has largely replaced XML for web APIs, XML remains essential in enterprise systems (SOAP APIs), document formats (DOCX, SVG, RSS/Atom), configuration (.NET, Java/Maven, Android), and industries with strict schema requirements (healthcare HL7, financial FpML, government).
XML vs JSON
JSON is simpler, smaller, and maps directly to native data structures. XML supports schemas (XSD), namespaces, attributes, mixed content, and XSLT transformations. Choose JSON for new web APIs; choose XML when you need document validation, mixed content, or must integrate with legacy systems.