Format, beautify, and validate XML documents instantly. Our free online tool processes everything locally in your browser, ensuring your data stays private and secure.
Saved Presets is a Supporter feature.
Tool History is a Supporter feature.
Tool Notes is a Supporter feature.
Copy your unformatted or messy XML data and paste it into the input field on the left. The tool accepts any valid XML including elements, attributes, namespaces, and CDATA sections.
Select your preferred indentation level: 2 spaces or 4 spaces. The choice is purely stylistic and doesn't affect the XML data itself.
Click "Format" to beautify your XML with proper indentation and line breaks, or click "Minify" to remove all whitespace for a compact version.
Once formatted, use the "Copy" button to copy the result to your clipboard, or click "Download" to save it as a .xml file.
Our XML formatter uses the browser's native DOMParser API to parse and validate XML documents. All processing happens locally in your browser, ensuring complete privacy and enabling offline functionality.
The tool parses your XML using the DOMParser API, which validates the document structure, checks for well-formedness, verifies proper tag nesting, and reports any syntax errors with their locations.
After successful parsing, the formatter reconstructs the XML string with proper indentation and line breaks. You can configure indentation to use either 2 or 4 spaces. The formatter preserves all original content including CDATA sections, comments, and processing instructions.
If the parser encounters an error, we capture the error message and display it to help you identify and fix the issue. Common errors include unclosed tags, mismatched tags, and invalid characters.
Optimal performance for files up to 10MB; larger files may cause browser lag. Very large XML files may exceed browser memory limits. The tool preserves content but may adjust whitespace during formatting.
Yes, our XML formatter is completely free with no registration required. You can format unlimited XML data directly in your browser without any costs or subscriptions.
