XML Formatter Online – Format and Indent XML Instantly

An XML Formatter is a tool that takes minified or poorly indented XML and reformats it into clean, readable output with consistent indentation. It is useful for reading API responses, debugging configuration files, reviewing data feeds, and sharing XML snippets in code reviews. Our XML Formatter runs entirely in your browser — no data is sent to any server.

Yes. The XML Formatter uses the browser's built-in DOMParser to parse your input before formatting. If the XML is malformed — for example a missing closing tag, an unescaped ampersand, or mismatched element names — the formatter will show an error message with the line number instead of producing broken output.

The XML Formatter handles standard XML documents including those with XML declarations (<?xml version="1.0"?>), namespaces, attributes, CDATA sections, and nested elements of any depth. It works well for RSS feeds, SVG files, Maven POM files, Android manifests, SOAP envelopes, and any other well-formed XML document.

There is no hard limit enforced by the tool. Formatting runs entirely in your browser using client-side JavaScript, so the practical limit depends on your device memory. Most XML files up to several megabytes format instantly. Very large files (50 MB+) may cause the browser tab to slow down.

XML Formatter keeps your data as XML — it only changes the whitespace and indentation to make the structure easier to read. XML to JSON converts the data into a different format entirely. Use XML Formatter when you want to inspect or share XML while keeping it as XML. Use XML to JSON when you need to process the data in a JavaScript application or REST API.

Yes. Once your XML is formatted, click the Download button in the output panel to save it as a .xml file with a timestamped filename. You can also click Copy to copy the formatted XML to your clipboard in one click.