XML Formatter
Pretty-print or minify XML with validation. Handles attributes, CDATA, and nested elements.
XML Input
Output
Formatted XML will appear here
XML Formatter and Validator
Paste XML and click Format to get a cleanly indented, readable document. Click Minify to collapse it to a single line. The validator uses fast-xml-parser to catch malformed XML before formatting and reports the exact line of any error. Download the result as a .xml file. All processing happens in your browser.
Frequently Asked Questions
- Does the formatter validate XML?
- Yes. The tool validates the XML structure before formatting and shows a descriptive error message with the line number if the XML is malformed.
- Does it preserve attributes and CDATA sections?
- Yes. Attributes are preserved with their values and CDATA sections are maintained in the output.
- Is my XML data safe?
- Yes. All formatting and validation is done using the fast-xml-parser library running in your browser. No XML is sent to any server.
- What does minify do?
- Minify removes all extra whitespace between tags, producing a compact single-line XML string. Useful for reducing payload size in APIs or config files.
- Can it handle large XML files?
- The tool handles typical XML files well. Very large XML files (several MB) may be slower due to browser memory limits, but most developer use cases work fine.