Minify & Unminify XML Online — Free Formatter

Minify, unminify and format XML documents instantly — compress configs and feeds before deploy or restore readability for audits. FastMinify preserves CDATA sections and processing instructions while everything stays in your browser.

XML Minification

Compressing XML files by removing whitespace, comments and unnecessary characters while preserving CDATA sections and processing instructions

Features

Our XML tool offers a complete set of features for working with XML data.

Minify XML

Remove whitespace, comments and unnecessary formatting from XML documents to reduce file size while preserving CDATA sections and processing instructions.

Unminify XML

Restore readable formatting to minified XML with proper indentation and line breaks. Essential for debugging configuration files, API responses and data feeds.

Basic example

Input XML

<?xml version="1.0" encoding="UTF-8"?>
<root>
  <item id="1">
    <name>Product</name>
    <price>29.99</price>
  </item>
  <item id="2">
    <name>Service</name>
    <price>49.99</price>
  </item>
</root>

Minified XML

<?xml version="1.0" encoding="UTF-8"?><root><item id="1"><name>Product</name><price>29.99</price></item><item id="2"><name>Service</name><price>49.99</price></item></root>

Minification options

Remove Comments

Removes all XML comments () from code

Comparison with/without option:

Original code

<root>
  <!-- This is a comment -->
  <item>Content</item>
  <!-- Another comment -->
</root>

With removeComments: true

<root><item>Content</item></root>

With removeComments: false

<root><!-- This is a comment --><item>Content</item><!-- Another comment --></root>

Collapse Whitespace

Collapses multiple whitespace characters into single spaces and removes spaces between XML tags. Preserves CDATA sections and processing instructions.

Comparison with/without option:

Original code

<root>
    <item>   Multiple   spaces   </item>
    <data>  Text  </data>
</root>

With collapseWhitespace: true

<root><item> Multiple spaces </item><data> Text </data></root>

With collapseWhitespace: false

<root><item>   Multiple   spaces   </item><data>  Text  </data></root>

XML conversion helpers now have dedicated URLs

Use standalone flows for interoperability: jump to XML → JSON, XML → YAML or XML → CSV while keeping XML minification and beautification centered on FastMinify’s primary XML formatter.

XML Formatting and Beautification

Proper XML formatting makes documents easier to read, debug and maintain. Our formatter adds consistent indentation, aligns attributes, and organizes elements hierarchically. This is especially useful for configuration files (web.xml, pom.xml), SOAP responses, and XML data feeds.

Minifying XML Sitemaps

XML sitemaps can grow large for sites with thousands of pages. Minifying your sitemap.xml removes unnecessary whitespace and comments, reducing file size and improving crawl efficiency. Our tool handles sitemap-specific elements like loc, lastmod, changefreq and priority correctly.

Frequently Asked Questions

Everything you need to know about minifying, formatting and validating XML safely

Why minify XML?

XML minification removes whitespace, comments and unnecessary formatting to reduce file size. This speeds up loading for configuration files, API responses, sitemaps and data feeds while preserving CDATA sections and processing instructions.

How do I unminify XML?

Paste your minified XML into the input area and click Unminify. The tool restores indentation and line breaks so you can read and edit the document. Essential for debugging web.xml, pom.xml, SOAP responses and other XML configs.

Where should I migrate XML payloads to JSON, YAML or CSV?

Open FastMinify’s Convert menu — XML → JSON, XML → YAML or XML → CSV isolate those flows so this formatter page stays focused on minify/beautify.

Does minification preserve CDATA sections?

Yes. Our XML minifier preserves CDATA sections and processing instructions (e.g. <?xml ... ?>). Only whitespace, comments and redundant formatting are removed so your document structure and embedded content stay intact.

Can I minify XML sitemaps?

Yes. Minifying sitemap.xml reduces file size and can improve crawl efficiency for large sites. The tool correctly handles sitemap elements such as loc, lastmod, changefreq and priority without altering their meaning.

What is the difference between HTML and XML minification?

HTML minification may apply HTML-specific rules (e.g. optional tags, attribute quotes). XML minification is stricter and preserves the exact structure and semantics of XML, including namespaces and processing instructions. Use our XML tool for config files, feeds and sitemaps.

Is my XML processed securely?

All XML processing runs entirely in your browser. No data is sent to our servers. Your documents, configs and API responses stay on your device and remain private.

Does unminifying change my XML content?

No. Unminifying only adds indentation and line breaks for readability. Element names, attributes, text content and structure are unchanged. The document is logically identical to the minified version.

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