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XML Formatter & Validator
Beautify, minify, and validate XML instantly with precise error locations. Convert XML into clean JSON when you need it. Runs entirely in your browser.
Understanding XML
Tree Structure
XML documents are trees of nested elements, each opened and closed with matching tags like ....
Attributes vs Elements
Data can live as an attribute (id="1") on a tag or as a nested child element — both are valid depending on the schema.
Well-formed XML
Every tag must be properly closed and correctly nested — one mismatched tag makes the whole document invalid.
XML to JSON
Attributes are prefixed with @ and text content uses #text — a common convention for lossless conversion.
How to Use the EMI / Loan Calculator
Paste Your XML
Drop your XML document into the input box — validation happens instantly as you type.
Pick a Mode
Format to beautify with indentation, Minify to strip whitespace, or convert to JSON.
fix
If the XML isn't well-formed, the exact error and line number are shown below the output panel.
Copy or Download
Copy the result or download it directly as a .xml or .json file for use in your project.
Frequently Asked
Questions
1. What does "well-formed XML" mean?
Well-formed XML follows basic syntax rules: every opening tag has a matching closing tag, tags are properly nested, there’s exactly one root element, and attribute values are quoted. This tool validates against those rules using the browser’s native XML parser.
2. Does this validate against a specific XML Schema (XSD)?
No — this checks that the XML is well-formed and syntactically correct, not that it conforms to a particular schema or DTD. Schema validation would need the specific XSD file as a reference.
3. How are attributes handled in XML to JSON conversion?
Attributes are converted to JSON keys prefixed with @ (e.g. @id), and any direct text content of an element is stored under #text, following a widely used XML-to-JSON convention.
4. Can I format XML with comments and CDATA sections?
Yes, comments (<!– –>) and CDATA sections (<![CDATA[ ]]>) are preserved during formatting and minifying, since the browser’s native parser handles both node types.
5. Is my XML data sent to a server?
No. Parsing and formatting run entirely in your browser using the built-in DOMParser and XMLSerializer APIs. Nothing is uploaded anywhere.
