XML Formatter & Validator
Beautify, minify, and validate XML online. Format XML with proper indentation and check well-formedness instantly.
What is XML Formatting?
XML (eXtensible Markup Language) is a text format for encoding structured data. XML formatting adds consistent indentation so nested elements are visually clear, making it far easier to read API responses, configuration files, and data exports.
This tool uses your browser's built-in DOMParser to parse XML, which catches all well-formedness errors that a strict XML parser would reject.
How to Use
- Paste your XML or upload a .xml file
- Choose Beautify, Minify, or Validate mode
- Adjust indent size in Settings
- Copy or download the result
Frequently Asked Questions
What is the difference between well-formed and valid XML?
Well-formed XML follows syntax rules (properly closed tags, quoted attributes). Valid XML also conforms to a DTD or XML Schema. This tool checks well-formedness only.
Can I format SVG files?
Yes! SVG is XML, so it can be formatted by this tool.
What about XHTML?
XHTML is also XML-based and can be formatted correctly with this tool.
Are XML namespaces handled correctly?
Yes. Namespace prefixes and declarations (xmlns) are preserved exactly as-is.
Does it support CDATA sections?
Yes. CDATA content is preserved verbatim without modification.