XML Formatter

About XML Formatter

The XML Formatter beautifies and validates XML documents with proper indentation, tag alignment, and namespace handling. Paste minified XML from APIs, configuration files, SOAP responses, or data exports to get clean, readable output instantly — all processed in your browser with zero server communication.

Why XML Formatting Is Essential

XML remains widely used in enterprise systems, SOAP web services, configuration files (web.config, pom.xml, AndroidManifest.xml), data interchange formats (XHTML, SVG, RSS, Atom), and document standards (XSLT, XSD, WSDL). Minified or auto-generated XML is often a single long line of deeply nested tags that is impossible to read or debug. Proper formatting reveals the document hierarchy, makes missing closing tags visible, and simplifies manual editing of XML configuration files.

Key Features

• Beautify XML — adds proper indentation and line breaks to make deeply nested XML structures easy to read and navigate.
• Minify XML — removes all unnecessary whitespace to reduce XML document size for transmission or storage.
• Well-formedness validation — checks XML structure and reports errors (unclosed tags, mismatched names) with line numbers.
• Namespace support — properly handles XML namespaces, prefixes, default namespaces, and namespace declarations.
• Syntax highlighting — Ace Editor with XML syntax coloring for tags, attributes, values, comments, and CDATA sections.
• CDATA preservation — CDATA sections are preserved as-is during formatting without modification.

How to Format XML

1. Load XML — paste XML into the input editor, upload an .xml file, or fetch from a URL.
2. Format or minify — click Format to beautify or Minify to compress.
3. Check errors — if the XML is malformed, the tool reports the error with its line and character position.
4. Export — copy the formatted XML to your clipboard or download it as an XML file.

XML Validation Tips

Well-formed XML requires every opening tag to have a matching closing tag, proper nesting (no overlapping tags), unique attributes per element, and properly escaped special characters (&, <, >). This tool checks for all of these issues and reports the first error found with its exact position. Fix errors one at a time, re-validating after each fix, as one error can cascade into false positives further in the document.

Real-World Use Cases

• Formatting SOAP API responses and WSDL definitions for debugging web service integrations.
• Beautifying XML configuration files (web.config, app.config, pom.xml, AndroidManifest.xml) for review and editing.
• Validating XML documents before submitting them to XML-based APIs, import tools, or schema validators.
• Cleaning up XML exports from databases, ERP systems, or enterprise applications for data analysis.
• Formatting SVG files, XSLT stylesheets, or XSD schemas for readability and maintenance.