JSON → XML Converter

JSON Input

XML Output

Why use a private JSON to XML converter?

Many enterprise systems, legacy APIs, and config formats still require XML as input. This converter transforms your JSON to well-formed XML entirely in your browser using fast-xml-parser. Your data never leaves the tab.

How it works

The JSON is parsed and passed to XMLBuilder, which maps JSON keys to XML elements. Keys starting with @ become element attributes, and #text becomes the text content of a mixed element. The output includes an XML declaration and is indented for readability.

XML requires a single root element. If your JSON object has multiple top-level keys, they are automatically wrapped in a <root> element. JSON arrays of objects produce repeated sibling elements with the same tag name.

Common use cases

Building SOAP request bodies from a JSON payload for legacy enterprise APIs
Generating Android XML resource files (strings.xml, layout attributes) from JSON config
Producing Maven pom.xml structures from a JSON dependency manifest
Converting JSON API responses to XML for systems that only accept XML input
Generating RSS or Atom feed XML from a JSON content source
Preparing XML fixtures for testing XML parsers and deserializers

Frequently asked questions

Is it safe to convert JSON that contains credentials or sensitive data?: Yes. fast-xml-parser runs entirely in your browser — your JSON is never sent to any server. You can verify this in DevTools → Network.
How do I produce XML attributes from JSON?: Prefix any JSON key with "@" and it will be serialized as an XML attribute. For example, { "item": { "@id": 1, "#text": "hello" } } produces <item id="1">hello</item>.
What happens if my JSON has multiple top-level keys?: XML requires a single root element. If your JSON object has more than one top-level key, the converter automatically wraps them in a <root> element and shows a warning.
Can I convert a JSON array to XML?: Not directly — XML has no concept of a bare array root. Wrap the array in an object first: { "items": [ ... ] }. Each array item will become a repeated <items> child element.

How it works

Common use cases

Building SOAP request bodies from a JSON payload for legacy enterprise APIs

Generating Android XML resource files (strings.xml, layout attributes) from JSON config

Producing Maven pom.xml structures from a JSON dependency manifest

Converting JSON API responses to XML for systems that only accept XML input

Generating RSS or Atom feed XML from a JSON content source

Preparing XML fixtures for testing XML parsers and deserializers

Frequently asked questions

Is it safe to convert JSON that contains credentials or sensitive data?

Yes. fast-xml-parser runs entirely in your browser — your JSON is never sent to any server. You can verify this in DevTools → Network.

How do I produce XML attributes from JSON?

Prefix any JSON key with "@" and it will be serialized as an XML attribute. For example, { "item": { "@id": 1, "#text": "hello" } } produces <item id="1">hello</item>.

What happens if my JSON has multiple top-level keys?

XML requires a single root element. If your JSON object has more than one top-level key, the converter automatically wraps them in a <root> element and shows a warning.

Can I convert a JSON array to XML?

Not directly — XML has no concept of a bare array root. Wrap the array in an object first: { "items": [ ... ] }. Each array item will become a repeated <items> child element.