How does the XML Formatter handle CDATA sections and comments?

CDATA blocks ( ) and XML comments are preserved with their exact character contents intact, ensuring embedded code or HTML snippets are not corrupted.

What happens if my XML document is malformed or missing a closing tag?

The built-in DOMParser catches syntax errors immediately, identifying the unclosed tag or malformed attribute and displaying a clear error notification.

Can I format SVG vector graphics and RSS/Atom feeds with this tool?

Yes. Because SVG and RSS feeds are built on standard XML grammar, this tool will beautify, indent, and validate their node structures perfectly.

Does this tool preserve the declaration?

Yes. XML prolog declarations and standalone attributes are retained at the top of the formatted document.

Developer Tools

XML Formatter & Beautifier

Format, beautify, validate, and minify XML data with syntax tree indentation, tag validation, and one-click export.

Validation

Valid XML

XML Elements0

Original Size645 B

Output Size645 B

Raw XML Input

Beautified XML

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
  <book id="bk101">
    <author>Gambardella, Matthew</author>
    <title>XML Developer's Guide</title>
    <genre>Computer</genre>
    <price currency="USD">44.95</price>
    <publish_date>2024-10-01</publish_date>
    <description>An in-depth look at creating applications with XML.</description>
  </book>
  <book id="bk102">
    <author>Ralls, Kim</author>
    <title>Midnight Rain</title>
    <genre>Fantasy</genre>
    <price currency="USD">5.95</price>
    <publish_date>2024-12-16</publish_date>
    <description>A fantasy tale set in an ancient kingdom.</description>
  </book>
</catalog>

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What is XML Formatter & Beautifier?

XML formatting restructures Extensible Markup Language tags into a clean visual hierarchy with consistent 2-space indentation and tag alignment according to W3C XML 1.0 specifications. The tool validates document structure, detects unclosed tags or syntax errors, and supports one-click minification with zero data transmission.

Designed for accuracy, speed, and privacy, this tool runs entirely on your local device with zero network latency.

How to Use the XML Formatter & Beautifier

1
Paste your XML document, SOAP envelope, RSS feed, or SVG code into the editor.
2
Select "Beautify" to format elements with hierarchical tree indentation, or "Minify" to strip tag whitespace.
3
If an XML syntax error occurs, review the line and tag error diagnostic displayed above the output.
4
Click "Copy XML" or "Download .xml" to save your clean document.

Formula & Calculation Logic

Validates well-formedness against W3C XML 1.0 grammar rules. The serializer traverses DOM nodes recursively, inserting structured indentation while respecting CDATA sections and XML declarations.

XML DOM Parsing: DOMParser.parseFromString(xml, "text/xml") -> Serialized Indented XML Tree

XML Formatter & Beautifier Frequently Asked Questions

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