XML to JSON Converter

1. Fundamental Architectural Differences

XML was engineered in the late 1990s as a document markup standard with support for schemas, mixed content, custom namespaces, and node attributes. In contrast, JSON emerged alongside modern web APIs as a lightweight data serialization format directly consumable by JavaScript.

2. How XML Attributes Map to JSON Keys

One of the biggest dilemmas when converting XML is how to handle tag attributes. In JSON, an object cannot have both a direct string value and sub-properties without an explicit structure.

{
  "product": {
    "@_id": "p101",
    "@_category": "electronics",
    "#text": "Wireless Mouse"
  }
}

Our tool lets you configure the prefix: stick with standard @_, use $, inline attributes without prefixes, or ignore attributes altogether.

3. Converting Repeated Elements into Arrays

In XML, multiple items under a parent simply repeat the same tag name. When converted to JSON, repeated tags are naturally grouped into an array:

{
  "members": {
    "user": ["Alice", "Bob"]
  }
}

4. Programmatic Conversion Code Snippets

If you are automating XML processing in your backend pipelines or CI/CD workflows, here is how to achieve the same conversion across popular programming languages:

import { XMLParser } from 'fast-xml-parser';

const xmlData = `<root><item id="1">Laptop</item></root>`;
const parser = new XMLParser({
  ignoreAttributes: false,
  attributeNamePrefix: '@_'
});

const jsonObject = parser.parse(xmlData);
console.log(JSON.stringify(jsonObject, null, 2));

import json
import xmltodict

xml_data = """<root><item id="1">Laptop</item></root>"""
data_dict = xmltodict.parse(xml_data)
json_data = json.dumps(data_dict, indent=2)

print(json_data)

package main

import (
    "fmt"
    "strings"
    "github.com/basgys/goxml2json"
)

func main() {
    xml := strings.NewReader("<root><item id=\"1\">Laptop</item></root>")
    jsonBuf, _ := xml2json.Convert(xml)
    fmt.Println(jsonBuf.String())
}