Converting Legacy XML to JSON for Modern REST APIs

Bridging the Gap Between Enterprise SOAP and Modern REST

Enterprise software architectures often rely on legacy SOAP web services or older databases that emit complex XML payloads. However, modern front-end frameworks like React, Vue, and Angular, as well as Node.js microservices, operate natively on JSON. Bridging this gap requires converting verbose XML data structures into clean JSON objects during integration development.

Handling Arrays and Nested XML Nodes in API Integration

One of the biggest challenges in API modernization is mapping repeated XML elements (such as multiple <item> tags) into JavaScript arrays. Our conversion utility automatically detects recurring child nodes and groups them into clean JSON arrays, eliminating manual structural rewrites.

<!-- Raw XML Response -->
<response status="200">
  <user id="42">
    <name>Alex Mercer</name>
    <roles>
      <role>Admin</role>
      <role>Developer</role>
    </roles>
  </user>
</response>

// Converted JSON Output
{
  "response": {
    "@status": "200",
    "user": {
      "@id": "42",
      "name": "Alex Mercer",
      "roles": {
        "role": ["Admin", "Developer"]
      }
    }
  }
}

Sample Transformation: XML Payload to REST-Friendly JSON