XML to JSON Converter
Convert XML data to JSON format with multiple input options. Paste XML data, load from URL, or upload a file to convert to structured JSON.
Input XML Data
Conversion Results
Enter XML data to convert
About XML to JSON Converter
A comprehensive XML to JSON converter that transforms XML documents into modern JSON format while preserving data structure and relationships. This tool handles complex XML schemas, namespaces, and attributes while generating clean, JavaScript-ready JSON output.
Why use a XML to JSON Converter?
JSON format is lighter, easier to parse, and natively supported by JavaScript applications compared to XML. Converting XML to JSON enables modern web development, API integration, and simplified data processing while maintaining compatibility with NoSQL databases and REST services.
Who is it for?
Essential for modern web developers, API designers, and system architects migrating from XML-based systems to JSON. Perfect for developers working with legacy XML data sources who need JSON for React, Vue, or other JavaScript frameworks and modern web applications.
How to use the tool
Upload your XML file, paste XML content directly, or provide a URL to your XML source
Configure conversion options for handling XML attributes, namespaces, and text content
Choose how to represent XML elements in JSON structure (objects, arrays, or mixed)
Preview the generated JSON to verify structure and data accuracy
Download the JSON file or copy the output for use in web applications and APIs
Frequently Asked Questions
How do I convert XML to JSON online?
Paste XML text, upload an .xml file, or load from a URL. The converter parses the XML and produces a JSON representation: elements become object properties, text content becomes string values, attributes are folded in (often with an '@' prefix). The output is valid JSON ready for use in JavaScript apps, REST APIs, or NoSQL databases. Copy or download as .json. Conversion runs entirely in your browser — your data never leaves the device. Common use: modernizing legacy XML feeds for consumption by modern code.
Does converting XML to JSON preserve the data structure?
Mostly. Both formats support nesting, but they differ in subtle ways. XML attributes need a convention to map to JSON — typically a '@' prefix in the key name. Mixed content (text + child elements at the same level) is awkward — JSON has no native equivalent. XML namespaces and CDATA sections get collapsed (the data survives, but the metadata structure flattens). XML's whitespace-significance is preserved by default. For most enterprise XML payloads (record-oriented, attribute-light), the conversion is clean and round-trippable.
Can I upload an XML file or load it from a URL?
Yes — all three input methods: paste XML text, upload a local .xml file, or fetch from a public URL. URL fetching requires the source to send CORS headers permitting cross-origin requests. For private endpoints or authenticated SOAP services, download the XML locally first. Files up to several MB convert quickly client-side.
Is my XML data sent to a server when I convert?
No. Conversion runs in your browser via JavaScript. The data never reaches a server, never gets logged. Verify in DevTools' Network tab: clicking convert produces zero HTTP requests. The exception is URL loading, where your browser fetches the source from the URL you provided (the URL host sees that request, but no Toolsana server is involved). Safe for sensitive enterprise XML, financial messages, healthcare HL7, or proprietary API responses.
How are XML attributes represented in JSON?
By convention, attributes get an '@' prefix in the key name. <user id="42" name="Joe"></user> becomes {user: {'@id': '42', '@name': 'Joe'}}. If the element also has text content, the text typically goes under a special key like '#text' or '_': <user id="42">Joe</user> becomes {user: {'@id': '42', '#text': 'Joe'}}. Different XML-to-JSON converters use slightly different conventions (some omit prefixes, some use '$attr' or 'attributes'). This converter uses the '@' prefix style, which is widely supported by libraries like fast-xml-parser, xml2js, and Java's underscore-prefixed convention.
Modernizing a legacy XML API consumer to JSON?
Canonical use case. Workflow: identify the XML endpoint, capture a sample response (curl, Postman, browser DevTools), convert via this tool, design your JavaScript / TypeScript types around the JSON shape, then replace your XML parser with a JSON parser in your application. For one-off discovery and prototyping, this tool is fast. For runtime conversion in production, use a streaming XML-to-JSON library (fast-xml-parser for Node, Python's xmltodict) so you're not loading entire payloads into memory. For round-tripping back to XML when needed, use [JSON to XML](/tools/json-to-xml/).
How much data can I convert at once?
Browser memory is the limit. The XML DOM in memory can be 3-5x the source size; up to ~10 MB XML / a few hundred thousand elements converts in 1-3 seconds. JSON output is typically smaller than the source XML (no closing tags, less verbose). Past 50 MB XML input, the browser may slow significantly or run out of memory. For very large XML processing, use a streaming SAX-based converter in Node (sax, expat) or Python (xml.sax). This tool fits the common 10 KB to few-MB case.
When does XML→JSON conversion get tricky?
Four common cases. (1) Mixed content (text and elements interleaved at the same level) — JSON has no native equivalent; the converter usually represents this as an array of mixed types. (2) Heavy namespace use — the JSON keys get long and ugly (xmlns:foo:bar). (3) XML schemas with optional fields — JSON conversion can't distinguish 'absent' from 'present-but-empty' without explicit nulls. (4) Repeated elements when there might be just one — JSON arrays vs single objects look different. For complex XML, write a custom mapping rather than relying on auto-conversion. For straightforward XML, this tool's defaults are usually correct.
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