JSON to XML Converter

How JSON maps to XML

JSON and XML model data differently, so a converter has to follow conventions. Here each object key becomes a child element with the same name, and its value becomes the element's content. Numbers and booleans are written as text, since XML has no types. An array becomes the same element repeated once per item: "tag": ["a", "b"] gives <tag>a</tag><tag>b</tag>. A JSON array at the top level, or an array directly inside another array, has no key to name its items, so the items use the Array item name, item by default.

null becomes an empty self-closing element such as <notes/>, and an empty string or empty array becomes an empty element with an opening and closing tag.

The root element

An XML document must have exactly one top-level element. The converter wraps your data in the element named in Root element. If you clear the name and your JSON is an object with a single key, such as {"rss": {...}}, that key becomes the root instead, so a document that came from XML converts back without an extra wrapper.

Attributes and text

Keys that start with the attribute prefix, @_ by default, become attributes of their parent element: "@_id": "bk101" becomes id="bk101". A #text key becomes the element's text content alongside its attributes. These are the same conventions that XML to JSON produces, so data survives a round trip. If your JSON uses a different prefix, such as @, change it in the toolbar.

Element names and escaping

XML names are stricter than JSON keys. They cannot contain spaces or most punctuation, cannot start with a digit, and names starting with xml are reserved. Keys like first name or 2fa are changed into valid names (first_name, _2fa) and a note above the output lists every change. Namespaced keys such as atom:link are kept as they are. In text and attribute values, &, < and > are escaped as entities, so the output is always well-formed.

Declaration and indentation

The output starts with <?xml version="1.0" encoding="UTF-8"?> unless you turn XML declaration off, which you may want when the XML will be embedded in another document. Elements are indented with two spaces.