XML to JSON Converter
Legacy XML data structures can be difficult to consume in modern frontend frameworks like React, Vue, or Next.js. Our high-performance XML to JSON converter solves this by transforming rigid XML into clean, flexible JSON objects. We support advanced parsing features including attribute preservation, CDATA extraction, and array consistency toggles—all running 100% locally in your browser for absolute privacy.
100% Private & Secure
This tool runs completely inside your browser using client-side WebAssembly and JS. Zero data is ever sent to our servers.
Attribute Handling
Our converter preserves XML attributes by prefixing them with "@_". This ensures metadata like id="1" is not lost during transformation, a common failure in basic XML parsers.
Array Consistency
By default, parsers convert single tags to objects and multiple tags to arrays. Enable "Force Every Tag as Array" to ensure your downstream code always receives a consistent structure, preventing "is it an array?" checks.
How to use this tool
- Paste your raw XML string into the input editor.
- Adjust settings like 'Ignore Attributes' if you only want the inner tag values.
- Enable 'Force Every Tag as Array' if you need a predictable structure for your code.
- Wait for the real-time conversion to complete in the JSON output editor.
- Copy the JSON or download for use in your API or frontend project.
Example Usage
<user active="true"><name>Dev</name></user>
{
"user": {
"@_active": true,
"name": "Dev"
}
}How to do this in Code
Native implementations for your backend or scripts
const { XMLParser } = require('fast-xml-parser');
const parser = new XMLParser({
ignoreAttributes: false,
attributeNamePrefix: "@_"
});
const jsonObj = parser.parse(xmlData);
console.log(JSON.stringify(jsonObj, null, 2));When to use this tool
- Modernizing legacy SOAP or XML-based API responses for AJAX consumption.
- Converting enterprise XSD/XML configuration files into readable JSON formats.
- Pre-processing data for NoSQL databases like MongoDB or AWS DynamoDB.
- Simplifying data visualization for complex XML-based financial or legal data feeds.
Frequently Asked Questions
How are XML namespaces handled?
Our parser is namespace-aware. It preserves namespace prefixes (e.g., <ns:tag>) in the JSON keys, ensuring that you can still distinguish between different schemas when processing the resulting object.
What is the difference between 'Attribute' and 'Text' nodes?
In XML, an attribute is part of the tag (id='1'), while a text node is the content inside (<tag>Text</tag>). Our tool prefixes attributes with '@_' so you can easily identify them in your JSON without them colliding with child element names.
Is there a performance limit for large XML files?
Because we use a high-speed V8-optimized parser running in your browser, we can handle multi-megabyte XML files with sub-second latency. For files larger than 50MB, the browser's memory limit is the primary constraint.
Can I use the output in a production application?
Yes. The generated JSON is strictly valid RFC 8259 format. By using the 'Force Array' option, you can guarantee a predictable structure that won't break your frontend logic when a single item is returned instead of many.
Built by Developers, For Developers
DevToolsLabs is engineered by a team of full-stack developers who were tired of spammy, ad-filled, server-side tools parsing our sensitive data. Every utility on this site is rigorously tested, strictly client-side (your data never leaves your browser), and built to solve real-world software engineering challenges.