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📄 XML Formatter & Beautifier — Format, Minify and Validate XML Free

Paste your XML and click Format to instantly pretty-print it with your choice of 2-space, 4-space, or tab indentation. Click Minify to strip all whitespace for compact output. The tool validates your XML using the browser-native DOMParser and shows clear error messages if the input is malformed. All processing runs entirely in your browser — your XML never leaves your device.

About

This XML formatter uses the browser-native DOMParser to parse and validate XML, then walks the resulting DOM tree to reconstruct a clean, indented output — no external libraries required. Beautify mode produces human-readable XML with consistent indentation (2 spaces, 4 spaces, or tab). Minify mode strips whitespace-only text nodes between elements to produce the most compact valid XML. Single-text-element children stay inline for maximum readability. The tool also preserves the XML declaration, comments, CDATA sections, and processing instructions. Because all work happens client-side in your browser, your XML data is never uploaded or stored anywhere.

How to use

  1. Paste your XML into the left input area, or click "Load sample" to try a demo document.
  2. Choose your preferred indent size — 2 spaces, 4 spaces, or tab — from the dropdown at the top.
  3. Click "Format (Beautify)" to pretty-print the XML with readable indentation in the right output area.
  4. Or click "Minify" to strip all whitespace between elements and produce the most compact valid XML.
  5. Copy the result with "Copy result" or download it as an .xml file. If the XML is invalid, a parse error message is shown instead.

FAQ

Is this XML formatter free to use?
Yes, completely free — no account, no subscription, no hidden fees. Open the page and start formatting immediately.
Is my XML sent to a server or stored anywhere?
No. All parsing, formatting, and validation happen entirely in your browser. Your XML never leaves your device. The last input is saved only in your browser's localStorage so you can resume later.
What does the formatter do if my XML is invalid?
It uses the browser-native DOMParser to detect errors and displays the exact parse error message below the output area. No formatted output is produced for invalid XML — you see the error first so you can fix it.
What is the difference between Format and Minify?
Format (Beautify) adds line breaks and consistent indentation so the XML is easy for humans to read and edit. Minify removes all unnecessary whitespace between elements to produce the shortest possible valid XML — useful for reducing file size when sending XML over a network or embedding it in code.
Does the tool preserve XML declarations, comments, and CDATA sections?
Yes. The XML declaration (such as <?xml version="1.0" encoding="UTF-8"?>) is detected from the source and prepended to the output. Comments and CDATA sections are preserved as-is through the DOM walk. Processing instructions are also retained.