Toolzie

XML Formatter & Validator

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How to Use the XML Formatter & Validator

Paste XML. Real-time validation with error highlights and line numbers. Format or minify. Copy result.

XML common in APIs and configs. Validate structure, find errors, format messy XML.

Frequently Asked Questions

Validates?

Well-formed XML: proper nesting, matching tags, syntax, escaping.

Format?

Yes, prettify minified XML.

Large files?

Yes, efficient handling.

Errors?

Mismatched tags, unescaped &, missing quotes, unclosed tags.

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About This Tool

Format, beautify, and validate XML with the Toolzie XML Formatter & Validator. Paste raw or minified XML to get properly indented output with syntax highlighting — and see any validation errors highlighted.

How to Use

  1. Paste your XML into the input field.
  2. Click Format to indent and beautify the XML.
  3. Any syntax errors are highlighted with line numbers and descriptions.
  4. Copy the formatted XML or download it as a file.

Frequently Asked Questions

What does XML validation check?

It checks that the XML is well-formed: all tags are properly opened and closed, attributes are quoted, and the document has a single root element.

Does it validate against an XML Schema (XSD)?

Basic validation checks well-formedness. Schema validation against a custom XSD requires a dedicated tool.

Can I minify XML?

Yes — use the Minify option to remove all whitespace and produce compact XML.

What is the difference between HTML and XML?

HTML is designed for web content with forgiving parsing. XML is strict, case-sensitive, and designed for structured data exchange.