JSON to XML Converter

About this tool

Convert a JSON document into well-formed XML without uploading data. Objects become nested elements, arrays use a configurable item element, scalar values become text, and null values become empty self-closing elements. Keys are sanitized into valid XML names so data with spaces or punctuation still produces parseable XML.

The default mapping treats object keys that start with @ as attributes and #text as element text. For example, {"book":{"@id":"dune","#text":"Dune"}} becomes <book id="dune">Dune</book>. Change those conventions if you need to match another JSON/XML pipeline, or clear the attribute prefix to render every key as a child element.

Worked example:

Input JSON:

{"book":{"@id":"dune","title":"Dune","authors":["Frank Herbert"]}}

With root_element=catalog and array_item_element=author, the XML is:

<catalog>
  <book id="dune">
    <title>Dune</title>
    <authors>
      <author>Frank Herbert</author>
    </authors>
  </book>
</catalog>

Limits and edge cases: this is a structural converter, not an XML schema validator. JSON has no native distinction between XML attributes, text nodes, comments, namespaces, processing instructions, and repeated sibling names, so those are controlled by simple naming conventions. Very large JSON documents can produce much larger XML; use compact mode when whitespace matters.

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