Converters
JSON to XML Converter
Paste your JSON and get clean, well-formatted XML instantly. OpenToolLab's JSON to XML converter runs entirely in your browser — your data never leaves your device.
Result
What makes this tool different
100% client-side
All conversion happens in your browser. No data is ever sent to a server — verifiable in your network tab.
Handles nested structures
Deeply nested JSON objects and arrays are converted to properly structured XML with correct parent-child relationships.
Pretty-print output
Converted XML is automatically formatted with proper indentation for easy reading and debugging.
Works offline
Once loaded, the converter works without an internet connection — perfect for secure environments.
About this tool
JSON to XML Converter: everything you need to know
JSON and XML are the two most widely used data interchange formats on the web. JSON dominates modern APIs and web applications because it is lightweight and easy to parse in JavaScript. XML remains essential in enterprise systems, SOAP web services, RSS feeds, Microsoft Office documents, and many configuration files. When you need to bridge these two worlds — sending JSON data to an XML-based system, migrating legacy APIs, or generating configuration files — a reliable JSON to XML converter saves hours of manual work.
OpenToolLab's free online JSON to XML converter handles this transformation entirely in your browser. Paste your JSON, click Convert, and get well-structured XML with correct nesting, proper element names, and appropriate data type handling. The converter supports all standard JSON types: strings, numbers, booleans, null, nested objects, and arrays. Deeply nested structures are mapped to clean XML hierarchies without losing any data.
Privacy is the core advantage over legacy converter sites. Most online JSON to XML tools upload your data to their servers for processing, which means your API payloads, configuration files, and sensitive data pass through infrastructure you do not control. OpenToolLab processes everything client-side — your data never leaves your browser. You can verify this yourself by opening DevTools Network tab while converting. Zero outgoing requests.
The converter produces clean, pretty-printed XML output that is ready to use in any system. You can configure the root element name, choose between 2-space or 4-space indentation, and control how arrays are mapped to XML elements. The output follows XML best practices with proper closing tags, correct nesting, and valid character encoding.
Common use cases include migrating REST API responses to SOAP services, generating XML configuration files from JSON data, converting API payloads for legacy systems that require XML input, and bridging modern web applications with enterprise middleware. The converter is also useful for developers learning the differences between JSON and XML data structures.
Unlike server-based converters that impose file size limits and require accounts, OpenToolLab has no restrictions. Convert as many files as you need, of any size your browser can handle, with no signup, no daily limits, and no premium tier. The tool works offline after the first load, making it usable in secure networks, on planes, or anywhere without internet access.
FAQ
JSON to XML Converter — frequently asked questions
What is a JSON to XML converter?
A JSON to XML converter transforms JSON (JavaScript Object Notation) data into XML (Extensible Markup Language) format. It maps JSON objects to XML elements, arrays to repeated elements, and preserves the hierarchical structure of your data.
How do I convert JSON to XML online for free?
Paste your JSON into OpenToolLab's free converter and click Convert. The tool transforms your data to XML instantly — all in your browser with no uploads, no signup, and no limits.
Can I convert nested JSON to XML?
Yes. The converter handles arbitrarily nested JSON objects and arrays, creating properly structured XML with correct parent-child relationships and namespace support.
Is this JSON to XML converter private?
Absolutely. All conversion happens in your browser using JavaScript. Your data is never uploaded to any server — you can verify this in your browser's Network tab.
What is the difference between JSON and XML?
JSON is lightweight, easy to read, and natively supported in JavaScript. XML is more verbose but supports attributes, namespaces, and schemas. JSON is preferred for APIs, while XML is common in enterprise systems, SOAP services, and configuration files.
Can I convert large JSON files to XML?
Yes. The converter handles large payloads efficiently since processing happens in your browser's memory. Very large files (10MB+) may take a moment but will still convert without server-side limits.
Does this tool preserve data types when converting?
Yes. Numbers, booleans, strings, and null values are mapped to appropriate XML representations. Numeric values are preserved as text content with optional type attributes.
How do I convert JSON to XML in my browser?
Open OpenToolLab's JSON to XML converter, paste your JSON data, and click the Convert button. The conversion happens instantly in your browser — no installation or signup required.
Can I customize the XML output format?
Yes. You can set the root element name, choose indentation size, and configure how JSON arrays and attributes are mapped to XML elements.
How do I handle JSON arrays in XML?
JSON arrays are converted to repeated XML elements under a parent container. For example, [{"id":1},{"id":2}] becomes <items><item><id>1</id></item><item><id>2</id></item></items>.
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