Free XML to JSON Converter — Transform XML Data Online

XML was the dominant data format of the 2000s. SOAP APIs, RSS feeds, configuration files, enterprise integrations — everything spoke XML. Today, JSON has replaced XML in most modern applications, but XML is far from dead. Legacy systems, government APIs, banking integrations, and SOAP services still produce XML that modern applications need to consume as JSON.

Our free XML to JSON converter parses any XML document and outputs clean, formatted JSON. Paste your XML, click convert, and copy the JSON output. Processing happens entirely in your browser — no data is uploaded.

What Is XML to JSON Conversion?

XML (eXtensible Markup Language) uses nested tags to structure data: <name>Alice</name>. JSON uses key-value pairs: {"name": "Alice"}. Converting between them means mapping XML elements to JSON properties, XML attributes to nested objects, and XML arrays to JSON arrays.

The challenge is that XML and JSON have fundamentally different data models. XML has attributes, namespaces, CDATA sections, and mixed content. JSON has objects, arrays, strings, numbers, booleans, and null. Not every XML structure maps cleanly to JSON, which is why automated conversion requires intelligent mapping rules.

Why Convert XML to JSON?

• Modern API integration. You receive data from a SOAP API or legacy system in XML, but your application expects JSON.
• Front-end consumption. JavaScript applications natively parse JSON but require libraries to parse XML. Converting once at the data layer is cleaner than parsing XML in the browser.
• Data migration. Moving from XML-based storage (legacy configs, old databases) to JSON-based systems (MongoDB, Firebase, modern APIs).
• Developer convenience. JSON is more compact and more readable than XML for most data structures. Converting XML to JSON makes data easier to inspect and debug.

Conversion Challenges and Edge Cases

Attributes. XML elements can have attributes: <product id="123">. The converter maps these to a special @attributes property in the JSON output.

Repeated elements. Multiple <item> elements become a JSON array. A single <item> element becomes a single object. Good converters handle both cases correctly.

Mixed content. XML elements can contain both text and child elements. This is the hardest case to convert because JSON has no direct equivalent.

Namespaces. XML namespaces (xmlns) add prefixes to element names. These are preserved in the JSON keys so you can identify which namespace each element belongs to.

Common Use Cases

RSS/Atom feed processing. RSS feeds are XML. If you are building a feed reader or aggregator in JavaScript, converting to JSON first makes the data much easier to work with.

SOAP API responses. Enterprise APIs often return SOAP XML. Convert the response to JSON for processing in modern application code.

Configuration file migration. Moving from XML config files (like Java's pom.xml or .NET's web.config) to JSON equivalents during modernization projects.

Data analysis. XML data is harder to load into data analysis tools than JSON. Convert first, then import into Pandas, R, or your analysis tool of choice.

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Frequently Asked Questions

Does this handle XML attributes?

Yes. XML attributes are converted to a special @attributes property in the JSON output, preserving all attribute data alongside element content.

Can it handle large XML documents?

Yes. The converter uses browser-native XML parsing which is efficient for documents up to several megabytes. For very large XML files, consider using a server-side tool like xmllint or jq.

Does it preserve XML namespaces?

Namespace prefixes are preserved in the JSON key names. This ensures you can identify which namespace each element belongs to in the converted output.

Is the conversion reversible?

In most cases, yes. However, some XML features (processing instructions, comments, CDATA sections) may not round-trip perfectly through a JSON intermediate format.

Is my XML data private?

Yes. Everything processes in your browser. No data is uploaded to any server.