JSON to XML Converter Online

JSON to XML Conversion Example

{
  "user": {
    "id": 101,
    "name": "Alice",
    "roles": [
      "admin",
      "editor"
    ],
    "active": true
  }
}

<?xml version="1.0"?>
<user>
  <id>101</id>
  <name>Alice</name>
  <roles>admin</roles>
  <roles>editor</roles>
  <active>true</active>
</user>

JSON to XML Mapping Rules

Convert JSON to XML in JavaScript

// Simple JSON to XML converter
function jsonToXml(obj, rootTag = 'root', indent = '') {
  if (Array.isArray(obj)) {
    return obj.map(item => `${indent}<item>${jsonToXml(item, 'item', indent + '  ')}</item>`).join('\n');
  }
  if (typeof obj === 'object' && obj !== null) {
    const children = Object.entries(obj)
      .map(([key, val]) => `${indent}  <${key}>${jsonToXml(val, key, indent + '  ')}</${key}>`)
      .join('\n');
    return `\n${children}\n${indent}`;
  }
  return String(obj);
}

const json = { name: 'Alice', age: 30 };
const xml = `<?xml version="1.0"?>\n<root>${jsonToXml(json)}</root>`;

// For production: use xml2js library
// npm install xml2js
import { Builder } from 'xml2js';
const builder = new Builder();
const xml = builder.buildObject(json);

Convert JSON to XML in Python

import json
import dicttoxml  # pip install dicttoxml

with open('data.json') as f:
    data = json.load(f)

xml_bytes = dicttoxml.dicttoxml(data, custom_root='root', attr_type=False)
print(xml_bytes.decode())

# Or using xmltodict:
import xmltodict
# xml → json: json.dumps(xmltodict.parse(xml_string))
# json → xml: xmltodict.unparse(json_dict, pretty=True)

When to Convert JSON to XML

• SOAP web services — Legacy enterprise APIs built on SOAP require XML request bodies
• Enterprise integrations — SAP, Oracle, Salesforce, and many ERP systems use XML internally
• RSS/Atom feeds — Feed formats are XML-based
• XSLT processing — If you need to transform data with XSLT stylesheets
• Document formats — Word (DOCX), Excel (XLSX), and other Office formats use XML internally

Frequently Asked Questions

Can I convert XML back to JSON?

Yes. JSON Web Tools includes an XML to JSON converter. Paste your XML and get JSON output instantly — the tool handles attributes, namespaces, and mixed content.

What happens to JSON arrays in XML?

JSON arrays become repeated XML elements with the same tag name. For example, ["a","b","c"] under key items becomes <items>a</items><items>b</items><items>c</items>. XML has no native array concept, so this is the standard approach.

Are JSON numbers preserved in XML?

XML has no type system — all values are text. The number 42 becomes the string "42" in XML. When converting back from XML to JSON, you need to apply type coercion to restore numbers and booleans from their string representations.

JSON to XML Conversion Examples

JSON and XML represent the same data in different formats. XML is still required by many SOAP APIs, enterprise systems, and document standards like XSLT, SVG, and RSS.

JSON Input → XML Output

// JSON Input
{
  "user": {
    "id": 1,
    "name": "Alice",
    "roles": ["admin", "user"]
  }
}

<!-- XML Output -->
<?xml version="1.0" encoding="UTF-8"?>
<root>
  <user>
    <id>1</id>
    <name>Alice</name>
    <roles>
      <item>admin</item>
      <item>user</item>
    </roles>
  </user>
</root>

JSON vs XML Structure Comparison

Convert in Python

# Using xmltodict library
import json, xmltodict

with open("data.json") as f:
    data = json.load(f)

xml_str = xmltodict.unparse({"root": data}, pretty=True)
print(xml_str)

JSON to XML Conversion Rules

Understanding how JSON types map to XML elements helps you predict the output and handle edge cases correctly.

• JSON object → XML element with child elements
• JSON array → repeated XML elements with the same tag
• JSON string/number/boolean → element text content
• JSON null → empty element or omitted

// Input JSON
{
  "order": {
    "id": "ORD-123",
    "customer": "Alice",
    "items": [
      {"name": "Widget", "qty": 2, "price": 9.99},
      {"name": "Gadget", "qty": 1, "price": 24.99}
    ],
    "total": 44.97
  }
}

<!-- Output XML -->
<?xml version="1.0" encoding="UTF-8"?>
<order>
  <id>ORD-123</id>
  <customer>Alice</customer>
  <items>
    <item>
      <name>Widget</name>
      <qty>2</qty>
      <price>9.99</price>
    </item>
    <item>
      <name>Gadget</name>
      <qty>1</qty>
      <price>24.99</price>
    </item>
  </items>
  <total>44.97</total>
</order>

JSON to XML in Code

// Node.js with js2xmlparser
const js2xmlparser = require('js2xmlparser');
const result = js2xmlparser.parse('order', jsonData);
console.log(result);

# Python with dicttoxml
import json, dicttoxml
data = json.loads(json_string)
xml_bytes = dicttoxml.dicttoxml(data, custom_root='root', attr_type=False)
xml_str = xml_bytes.decode('utf-8')

When to Use XML vs JSON