JSON to XML Converter
Convert JSON data to XML format with multiple input options. Paste JSON data, load from URL, or upload a file to convert to structured XML.
Input JSON Data
XML Output
Convert JSON data to see XML output
About JSON to XML Converter
A comprehensive JSON to XML converter that transforms JSON objects and arrays into well-formed XML documents. This tool preserves data hierarchy, handles complex nested structures, and generates valid XML with customizable element names and attributes.
Why use a JSON to XML Converter?
XML format provides schema validation, namespace support, and better integration with enterprise systems compared to JSON. Converting JSON to XML enables compatibility with SOAP services, legacy systems, and applications requiring structured markup with metadata and validation capabilities.
Who is it for?
Essential for enterprise developers, system integrators, and architects working with legacy systems, SOAP web services, or XML-based data exchange protocols. Perfect for migrating modern JSON APIs to XML-compliant systems or creating XML feeds from JSON data sources.
How to use the tool
Input your JSON data using file upload, direct paste, or URL import methods
Configure XML generation settings including root element names and attribute mapping
Set up custom element naming conventions for JSON properties and arrays
Generate and preview the XML output to verify proper structure and formatting
Download the XML file or copy the markup for integration with XML-based systems
Frequently Asked Questions
How do I convert JSON to XML online?
Paste JSON text, upload a .json file, or load from a URL. The converter walks the JSON tree and emits well-formed XML: objects become elements with child elements per key, arrays become repeated child elements, primitives become text content. The output is valid XML 1.0 wrapped in a root element. Copy or download as .xml. Conversion runs entirely in your browser — your data never leaves the device. Suitable for legacy XML-based APIs, SOAP services, EDI gateways, and XSLT pipelines.
Does converting JSON to XML preserve the data structure?
Largely yes — both formats support nested structures and type-tagging. Objects map to elements containing child elements (one per key); arrays map to repeated same-named child elements; primitives become element text content. What XML can do that JSON can't: attributes (this converter uses elements rather than attributes by default), mixed content (text + elements in the same node), namespaces, CDATA sections. What's clarified by the conversion: array semantics — JSON's [1, 2, 3] becomes <item>1</item><item>2</item><item>3</item>, with the array boundary implicit (the parent element).
Can I upload a JSON file or load it from a URL?
Yes — all three input methods: paste JSON text, upload a local .json file, or fetch from a public URL. URL fetching requires the source to send CORS headers. For private files, download locally first. The JSON input must be valid — if you're not sure, run it through the [JSON Validator](/tools/json-validator/) before conversion.
Is my JSON data sent to a server when I convert?
No. Conversion runs in your browser via JavaScript. Your JSON 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 API responses or financial data.
How are JSON arrays represented in XML?
JSON arrays become repeated child elements with the same tag name. {tags: ['a', 'b', 'c']} becomes <tags>a</tags><tags>b</tags><tags>c</tags>. The array boundary is implicit — when consuming XML, you can't distinguish between 'a single tags element' and 'an array with one tags element'. For unambiguous representation, some converters use a wrapper: <tags><item>a</item><item>b</item></tags>. This converter uses the simpler repeated-element form. If your XML consumer expects wrapper elements, post-process the output.
Sending JSON data to a legacy SOAP / XML API?
Common workflow: take a JSON payload from your modern system, convert to XML, wrap in the SOAP envelope, POST to the legacy endpoint. For repeated integration, automate with a Python script (xml.etree, lxml), Node (xml2js), or Java (JAXB). For one-off bridging or troubleshooting, this manual tool is faster. After processing the XML response, use [XML to JSON](/tools/xml-to-json/) to bring data back to JSON. Note the round trip is lossy: JSON arrays of objects with attributes don't survive XML→JSON cleanly without conventions.
How much data can I convert at once?
Browser memory is the limit. XML is verbose (2-4x larger than JSON due to opening/closing tags), so JSON inputs up to ~5 MB produce XML outputs up to ~15 MB — converting in 1-2 seconds. Past 20 MB output, the browser may slow or run out of memory. For very large XML emissions, use a streaming serializer (Python's lxml, Node's sax) that emits tag-by-tag instead of holding everything in memory. This tool fits the common 10-500 KB case.
When should I use XML instead of JSON in 2026?
Legacy interop only. Many enterprise systems (SOAP services, EDI gateways, government data exchanges, healthcare HL7) accept only XML. XML's strengths (XSD validation, namespaces, mixed content, XSLT) matter mostly for document-centric use cases. For greenfield development, JSON is the modern default — smaller, faster to parse, native in JavaScript and most modern languages. Convert via [JSON to CSV](/tools/json-to-csv/) for spreadsheet workflows instead. Stick with XML only when the consumer requires it.
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