XML to JSON Converter Online Free — Complete Guide

Why XML Still Matters in a JSON World

JSON became the dominant data format for REST APIs and web applications after 2010, but XML is not going away. Several critical domains continue to rely on XML:

• SOAP web services — thousands of banking, insurance, healthcare, and government SOAP APIs still return XML responses and expect XML request payloads.
• Financial data standards — ISO 20022 (the international standard for financial messaging), FIX protocol, SWIFT messages, and XBRL (financial reporting) all use XML.
• Office document formats — Microsoft Office files (DOCX, XLSX, PPTX) are ZIP archives containing XML files. OpenDocument Format (ODF) is also XML-based.
• Configuration files — Maven, Ant, Spring, Android resources, web.xml, struts.xml, and many other Java/enterprise configuration files use XML.
• RSS and Atom feeds — web content syndication still widely uses XML-based feed formats.
• SVG and MathML — scalable vector graphics and mathematical markup are XML languages embedded in HTML5.
• Publishing and documentation — DITA, DocBook, TEI, JATS, and Darwin Information Typing Architecture are all XML-based document formats used in technical writing, academic publishing, and healthcare documentation.

Modern developers regularly encounter XML when integrating with legacy systems, processing financial data, consuming enterprise APIs, or working with document generation pipelines. Converting to JSON brings the data into the format that modern JavaScript, Python, and Ruby ecosystems work with natively.

How XML Elements Map to JSON

The mapping from XML to JSON is less obvious than the reverse because XML has concepts (attributes, namespaces, comments) that have no JSON equivalent:

A complete conversion example

Given this XML input:

<?xml version="1.0" encoding="UTF-8"?>
<person id="42">
  <name>Alice Chen</name>
  <age>32</age>
  <address>
    <city>London</city>
    <country>UK</country>
  </address>
  <tag>developer</tag>
  <tag>designer</tag>
  <bio><![CDATA[Alice is a full-stack developer with 10+ years of experience.]]></bio>
</person>

The converter produces:

{
  "person": {
    "@id": "42",
    "name": "Alice Chen",
    "age": "32",
    "address": {
      "city": "London",
      "country": "UK"
    },
    "tag": ["developer", "designer"],
    "bio": "Alice is a full-stack developer with 10+ years of experience."
  }
}

Note that age is "32" (a string) in the JSON output, not the number 32. XML does not differentiate between strings and numbers — all element content is text. If your downstream application needs numeric types, parse string values to numbers after conversion.

How to Convert XML to JSON — Step by Step

1. Open the tool. Navigate to the XML to JSON Converter.
2. Paste your XML. Paste your XML document into the left panel. The tool validates the XML first — if it is malformed, an error message indicates the problem.
3. Review the output. The JSON appears in the right panel. Check the attribute handling (@ prefix), array detection (repeated elements), and type handling (all values are strings unless post-processed).
4. Copy or download. Click Copy to copy the JSON, or Download to save it as a .json file. Paste into the JSON Formatter to pretty-print with syntax highlighting.

Common Use Cases for XML to JSON Conversion

Processing SOAP API responses in JavaScript

SOAP web services return XML envelopes. A typical SOAP response looks like:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <GetCustomerResponse>
      <customer id="1001">
        <name>Acme Corp</name>
        <balance>15000.00</balance>
      </customer>
    </GetCustomerResponse>
  </soap:Body>
</soap:Envelope>

Converting this to JSON makes it far easier to work with in JavaScript, especially when you need to extract specific fields (response.customer.balance vs navigating XML DOM nodes).

Processing RSS and Atom feeds

RSS 2.0 and Atom feeds are XML-based. Converting to JSON allows processing with standard JavaScript array methods rather than XML DOM APIs:

// After XML to JSON conversion:
const items = feed.rss.channel.item;
const titles = items.map(item => item.title);
const recentLinks = items
  .filter(item => new Date(item.pubDate) > lastWeek)
  .map(item => item.link);

Migrating data from XML-based systems

Many legacy content management systems, product catalogs (in retail and manufacturing), and data warehouses export data in XML format. Converting to JSON enables import into modern systems (MongoDB, Elasticsearch, REST APIs, Firebase) that natively consume JSON.

Consuming financial data feeds

Financial data providers (Bloomberg, Reuters, stock exchanges) often provide XML-based data feeds. Converting to JSON enables processing with pandas in Python, or with JavaScript/TypeScript for real-time data pipelines.

Parsing Android resource files

Android application resources (strings.xml, arrays.xml, colors.xml) are XML files. Converting to JSON enables using the resource values in cross-platform tooling, documentation generation, or localization workflows that work better with JSON.

Handling XML Namespaces

XML namespaces are a common source of complexity in XML parsing. A namespace-qualified element looks like <soap:Body xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">. The converter handles namespaces by:

• Preserving namespace prefixes in the JSON key names:<soap:Body> becomes "soap:Body".
• Including namespace declarations as @xmlns:prefix keys in the JSON object.

If you do not need namespaces in the output JSON, strip them from the XML before converting. In Python: xml.etree.ElementTree.fromstring(xml_string)parses and re-serializes XML without namespace prefixes by default in some configurations. In XSLT: use <xsl:copy-of select="*"/> patterns to strip namespace declarations.

XML Validation Before Converting

The converter requires well-formed XML. Common XML errors that prevent conversion:

• Unclosed tags — every opening tag must have a corresponding closing tag or be self-closing (/>)
• Mismatched tags — <name> opened but </Name> closed (XML is case-sensitive)
• Invalid characters — raw &, <, and > characters in content must be escaped as &, <, and >
• Multiple root elements — XML documents must have exactly one root element
• Invalid attribute syntax — attribute values must be quoted

Use an XML Formatter & Validator to validate and fix your XML before converting. The formatter highlights line numbers for errors, making them easy to locate and correct.

Type Conversion Considerations

XML stores all values as text. When the XML to JSON converter encounters <age>32</age>, it cannot know whether 32 is a JSON number or a string — it could be either in a valid JSON document. The converter outputs all values as strings by default.

If your downstream application needs specific JSON types:

// Post-process the JSON to convert types
const data = JSON.parse(xmlToJsonResult);

// Convert age to number
if (data.person?.age) {
  data.person.age = Number(data.person.age);
}

// Convert active to boolean
if (data.person?.active) {
  data.person.active = data.person.active === 'true';
}

Automated type coercion (numeric strings → numbers, "true"/"false" → booleans) is done by some XML-to-JSON converters, but it introduces ambiguity — a string value of "null" might be legitimately "null" as text, not the JSON null value. Explicit post-processing is safer for production code.

Frequently Asked Questions

Is my XML uploaded to a server?

No. Parsing and conversion run entirely in your browser using JavaScript. Your XML data never leaves your device.

How are XML attributes handled in the JSON output?

XML attributes are included in the JSON output with an @ prefix on the key name. For example, <tag id="1" class="primary"> produces{"@id": "1", "@class": "primary"} alongside any child elements.

What happens with repeated XML elements?

When multiple sibling elements share the same tag name, the converter represents them as a JSON array. A single instance is represented as a single value (not an array of one element). This means the type of a key can change depending on how many elements are present — handle this in downstream code.

Does the converter handle large XML files?

Yes, within browser memory limits. For XML files larger than a few MB, the browser-based converter may be slow. For very large XML files (tens of MB), use command-line tools: Python (xmltodict library), Node.js (xml2js), or dedicated ETL tools.

What XML namespaces do to the JSON output?

Namespace prefixes become part of the JSON key name (e.g., "soap:Body"), and namespace declarations become@xmlns:prefix keys. If you want clean JSON keys without namespace prefixes, strip namespaces from the XML before converting, or post-process the JSON keys to remove prefixes.