XML

XML Formatter

Format, validate, and beautify XML data with proper indentation

Indent:

Preserve commentsAuto-formatLine numbers

Input XML

Output

Formatted XML will appear here

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What is XML Formatter?

Free online XML formatter to format and beautify XML documents with proper indentation and optional syntax validation.

Paste messy or minified XML and get a clean, readable structure with consistent indentation. The tool validates well-formedness, highlights errors with line numbers, and supports minification for production use. Handles large XML files, CDATA sections, comments, processing instructions, and namespaces. Runs entirely in your browser - your XML data stays private and secure. No signup required.

How to Use XML Formatter

1Paste your XML data into the input area
2Select your preferred indentation (2 spaces, 4 spaces, or tab)
3Click 'Format' to beautify or 'Minify' to compress your XML
4Review the output, check for validation errors, and copy the result

Frequently Asked Questions

XML formatting (or pretty-printing) adds proper indentation and line breaks to XML data so that the hierarchical structure of elements is visually clear. Formatted XML is much easier to read, debug, and compare than minified or single-line XML.

Yes. The tool checks for well-formedness, ensuring all tags are properly opened and closed, attributes are quoted, and the document follows XML syntax rules. Validation errors are reported with clear messages indicating the line and type of error.

Yes. The formatter processes XML entirely in your browser and can handle files up to several megabytes. For extremely large files, processing may take a few seconds depending on your device's performance.

Yes. CDATA sections, XML comments, processing instructions, and namespace declarations are all preserved during formatting. The tool only modifies whitespace and indentation - content is never altered.

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