JSON to XML Converter

What Is a JSON to XML Converter?

JSON to XML conversion is needed when integrating modern web services with enterprise systems that expect XML. While JSON has become the dominant API format, XML remains the standard in banking (ISO 20022), healthcare (HL7 FHIR supports both), government data exchanges, and legacy SOAP web services. This converter maps JSON structures to well-formed XML, handling arrays, nested objects, and special characters automatically.

Example

JSON Input:

{"user":{"name":"Alice","age":30,"roles":["admin","editor"]}}

XML Output:

<?xml version="1.0"?>
<user>
  <name>Alice</name>
  <age>30</age>
  <roles>admin</roles>
  <roles>editor</roles>
</user>

How to Use This Converter

Paste your JSON data into the input panel.
View the converted XML output — it updates instantly.
Click Copy to copy the result to your clipboard.
Verify the output matches your expectations before using in production.

Developer Tips

JSON arrays do not have a direct XML equivalent. Most converters wrap array items in generic item tags, but APIs often expect specific tag names. Check the expected XML schema before converting.
JSON allows duplicate keys (though it is bad practice). XML does not allow duplicate element names at the same level. A JSON-to-XML conversion will silently overwrite duplicates - validate your JSON structure first.
XML requires a single root element. If your JSON is an array at the top level, the converter wraps it in a root tag. Rename this to something semantic before sending it to an API that validates against a schema.

Related Converters

All conversions run entirely in your browser — no data is sent to any server. For the specification, see W3C — XML 1.0 Specification.

Frequently Asked Questions

Why convert JSON to XML?

Many enterprise systems, SOAP APIs, and legacy applications require XML. If your data source provides JSON but your target system expects XML, this conversion bridges the gap. XML is also required for specific standards like SVG, XHTML, and RSS feeds.

How are JSON arrays represented in XML?

JSON arrays don't have a direct XML equivalent. The common approach is to repeat the parent element name for each array item. For example, a JSON array 'colors: ["red", "blue"]' becomes '<colors>red</colors><colors>blue</colors>' in XML.

What happens to JSON null values in XML?

JSON null is typically represented as an empty XML element (<field/> or <field></field>) or with an xsi:nil='true' attribute, depending on the conversion strategy. There is no universal standard for this mapping.

Is JSON or XML better for APIs?

JSON is the modern standard for web APIs — it's lighter, faster to parse, and native to JavaScript. XML is still used in enterprise SOAP services, banking (ISO 20022), and document formats (DOCX, SVG). Choose based on your integration requirements.

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