XML Formatter & Validator

Format, beautify, and validate XML documents online. Convert XML to JSON, minify XML for production. Free online XML formatter with instant error detection. No signup required.

Features

Common Use Cases

XML is still widely used in enterprise software, SOAP APIs, configuration files (Maven, Android manifests, .NET configs), RSS and Atom feeds, SVG graphics, and Office document formats. The formatter makes large XML files readable, the validator catches well-formedness errors before they break a parser, and the XML-to-JSON converter simplifies working with XML data in JavaScript.

How to Use

  1. Paste your XML into the input area.
  2. Click Format to indent and pretty-print the XML with proper nesting.
  3. Click Validate to check for well-formedness errors. The exact line and character of any error is reported.
  4. Click Minify to strip whitespace for production use or network transmission.
  5. Use Convert to JSON to transform the XML structure into a JSON object.

Privacy & Security

All processing for XML Formatter & Validator runs entirely in your browser. Your data — whether text, files, or other content — is never transmitted to any server. DevToolHub has no backend that receives or stores your inputs. This means the tool works even offline once the page has loaded, and there is no risk of your data being intercepted or stored by a third party.

Frequently Asked Questions

What's the difference between XML and HTML?

HTML is used to display data and has predefined tags. XML is used to store and transport data, and you define your own tags. XML is also stricter — every tag must be explicitly closed.

Can this tool validate against a DTD or XSD?

Currently, this tool checks if the XML is well-formed (syntactically correct). Full schema validation against a DTD or XSD requires the schema file to be available at validation time, which goes beyond a browser-based tool.

Does XML to JSON conversion preserve all data?

Most data is preserved, but some XML concepts like attributes and namespace prefixes require transformation decisions. Review the output when converting complex schemas.

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