How to Format XML
XML Formatting
When to Format XML
Pretty-print XML from SOAP responses, RSS feeds, Android layouts, Maven POM files, or legacy config exports. Readable indentation helps spot unclosed tags, namespace issues, and deeply nested structures during integration debugging.
Format vs Validate
Formatting improves readability but does not guarantee schema compliance. Run XML Validate after formatting to confirm well-formedness before parsing with strict production libraries or uploading to downstream systems.
Developer Tips
- Format before diffing XML config changes in version control
- Validate well-formedness separately — formatting alone does not check XSD schemas
- Large documents may be slow in the browser — use CLI tools for multi-megabyte files
Frequently asked questions
Does formatting validate against XSD?
No. This tool checks well-formedness during parsing but does not validate against XSD or other schemas.
Are XML declarations preserved?
Formatted output includes a standard XML declaration when appropriate for the parsed document.