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Tools / Data & JSON

XML Formatter & Validator

Validate XML syntax, format nested tags or compact formatting whitespace locally with browser DOMParser and XMLSerializer.

Checks XML syntax, formats element-only content and minimizes whitespace between elements. Mixed text is preserved.

Processing occurs locally in your browser. DTD and ENTITY declarations are rejected for safety. Everything runs locally in your browser.

What is XML Formatter & Validator?

XML is a hierarchical markup format used for messages, documents and configuration. This XML formatter validates well-formed syntax and indents element-only structures, while avoiding transformation of mixed text content. It does not validate against an XSD or DTD, and DTD/entity declarations are blocked for safety.

How to use this tool

  1. Paste XML with an element root and optional XML declaration.
  2. Choose Format to indent nested elements or Minify to remove formatting-only whitespace.
  3. Review and copy or download the XML result; test any mixed-content documents before replacing production input.

Example

<root><name>Ada</name><active>true</active></root>

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