Format, beautify, and validate XML online. Pretty-print minified XML with proper indentation. Supports custom indent size. This tool runs entirely in your browser — no data is sent to any server.
XML remains foundational in enterprise systems, configuration files (Maven pom.xml, Android layouts, Spring configs), data interchange (SOAP, RSS, SVG), and document formats (DOCX, XLSX are ZIP archives of XML files). Despite JSON's popularity for APIs, XML's features — namespaces, schemas, XSLT transformations, and mixed content — keep it essential in many domains. This formatter parses XML, validates structure, and outputs it with consistent indentation. It catches unclosed tags, mismatched nesting, invalid characters, and encoding issues. Minified XML from production systems becomes readable, and hand-edited XML gets its indentation fixed. All processing happens locally in your browser.
XML is strict: every tag must be closed, attributes must be quoted, and it's case-sensitive. HTML is forgiving: browsers render
, unclosed tags, and unquoted attributes. XHTML attempted to combine both — HTML following XML rules — but HTML5 relaxed back to lenient parsing.
Absolutely. Enterprise systems (SOAP services, EDI), configuration (Maven, Android, Spring, .NET), document formats (Office documents, SVG), and data standards (HL7 in healthcare, XBRL in finance) all rely on XML. It's less trendy than JSON but deeply embedded.
Namespaces prevent naming conflicts when combining XML from different sources. xmlns:prefix='URI' declares a namespace.
XML schemas (XSD) define the structure, elements, attributes, and data types allowed. Validation checks your XML against the schema. This formatter validates well-formedness (syntax) but not schema compliance — use dedicated XML validators for schema validation.
CDATA sections () contain text that won't be parsed as XML markup. Useful for embedding code, HTML, or text containing < and & characters without escaping them as < and &.