XML Tools — 5 Free Online XML Utilities
Work with XML directly in your browser: validate well-formedness, pretty-print with indentation, minify for transport, structurally compare two documents, and convert XML to JSON. All tools are privacy-first and run client-side.
All XML tools
XML
XML Validator
Validate XML syntax and detect well-formedness errors.
Open tool
XML
XML Formatter
Pretty-print and indent XML documents for readability.
Open tool
XML
XML Minifier
Compact XML into a single line by removing whitespace.
Open tool
XML
XML Compare
Structurally compare two XML documents.
Open tool
XML
XML to JSON
Convert XML documents to JSON objects.
Open tool
Frequently asked questions
- What does 'well-formed XML' mean?
- An XML document is well-formed if every opening tag has a matching closing tag, tags are correctly nested, attribute values are quoted, and there is a single root element. The XML Validator checks all of these rules.
- Is XML schema validation supported?
- The XML Validator checks well-formedness only — it does not validate against an XSD schema. XSD validation is on the roadmap.
- How does XML to JSON conversion handle attributes?
- Attributes are stored under a special @attributes key in the resulting JSON object. Repeated tags become arrays, and text content is stored under a #text key when mixed with attributes.
- Are my XML documents sent to any server?
- No. Parsing, formatting, minifying, and comparing XML all happen in your browser using the native DOMParser. Nothing is uploaded.
- What's the difference between XML formatting and minifying?
- Formatting adds indentation and newlines to make XML readable. Minifying strips whitespace nodes for a compact one-line output — useful for transport or storage size.