Yes. All conversion happens in your browser using JavaScript — your JSON data never leaves your device, never touches a server, and is never stored or logged. You can verify this by opening your browser's Developer Tools (F12), going to the Network tab, and clicking Convert. You will see zero network requests.

Can it handle large JSON files?

Yes, up to practical browser memory limits. Files up to 10 MB convert smoothly. Very large files (50 MB+) may cause the browser tab to slow down due to JavaScript memory constraints, but there are no hard limits since all processing is local.

How do I specify XML attributes?

Prefix any JSON key with @ to convert it into an XML attribute. For example, "@class": "highlight" becomes class="highlight" in the output XML. This lets you precisely control which data becomes attributes versus child elements.

Does it handle nested arrays and objects?

Yes, the converter recursively processes all nesting levels. Arrays of objects become repeated elements with child elements for each property. Deeply nested structures are fully preserved in the output XML.

JSON to XML Converter

Convert JSON data into well-formed XML documents. Supports nested objects, arrays, attributes with @ prefix, and pretty-printing — all in your browser.

Input — Paste your JSON

Output — XML result

Root element: Pretty-print output Include XML declaration

🔒 Runs entirely in your browser — your data never leaves this device. How we verify this.

Also try: JSON to CSV CSV to JSON XML to JSON CSV to ICS ICS to CSV All Tools

How to Convert JSON to XML

Paste your JSON data into the input field. The tool is pre-loaded with sample data — a users array with nested attributes — so you can see a realistic conversion immediately.
Set your root element name. XML documents require a single root element. The default is root, but you can name it anything valid — catalog, feed, urlset for a sitemap. Choose pretty-printing for indented, human-readable output, and optionally include the XML declaration.
Choose array item naming. When your JSON has arrays, each item gets wrapped in an element using the array's key name. "users": [...] produces <users><user>...</user></users> — the singular form is inferred automatically.
Click "Convert to XML" then download your well-formed XML file. The output is ready for SOAP services, RSS generation, sitemap submission, or any XML-consuming pipeline.

Supported Features

Configurable root element. Name your document's outermost tag to match your target spec — rss, urlset, Envelope, or anything your downstream system expects.
Array item naming. Arrays automatically produce repeated child elements. The plural key "items" wraps singular <item> entries — no manual template configuration needed.
Attribute detection via @ prefix. Keys starting with @ become XML attributes on the parent element. "@version": "1.0" inside an object generates version="1.0" on that object's element.
Null handling. JSON null values produce self-closing tags: "middleName": null → <middleName/>. This preserves the key in the XML structure.
Pretty-print indentation. Toggle indented output with configurable depth. Minify for wire transfer, expand for human review and debugging.
Type preservation. Numeric and boolean values are rendered as their string representations in the XML text content, preserving the original value for round-trip fidelity.

When to Use JSON to XML

Building SOAP request payloads. Enterprise SOAP services expect XML envelopes with specific namespaces and structure. Start with a clean JSON representation of your data, use @ prefixes for SOAP attributes, set the root to Envelope, and generate a valid SOAP body without hand-writing XML.
Generating RSS feeds programmatically. Podcast RSS, blog syndication, and news feeds all follow the RSS 2.0 XML schema. Store your feed content as JSON objects, then convert with the root element set to rss and channel metadata as attributes.
Creating sitemap.xml from URL lists. SEO tools and crawler outputs often produce URL lists in JSON. Convert to sitemap XML format by setting the root to urlset (with the sitemap namespace attribute) and each URL entry as an array item.
Integrating with legacy infrastructure. When your modern microservice needs to talk to a 15-year-old ERP system that only accepts XML, convert your JSON output to XML at the integration boundary rather than rewriting your entire service.
Generating configuration files. Maven pom.xml, Spring bean definitions, Android manifests, and .NET web.config all use XML. Store your configuration in JSON for easier programmatic manipulation, then convert to XML for deployment.

Format Gotchas

JSON keys must be valid XML element names. XML element names cannot contain spaces, cannot start with a digit or punctuation, and cannot include characters like < or &. The converter sanitizes invalid JSON keys by replacing problematic characters with underscores, but it's better to use clean keys from the start: "firstName" not "first name".
Arrays need explicit item naming. If your JSON array lacks a descriptive parent key — like a top-level array [{"name":"A"}, {"name":"B"}] — the converter uses the root element name for each item. For clarity, always wrap arrays in a named object property when possible.
Empty objects produce self-closing tags. "metadata": {} becomes <metadata/>. This is valid XML but may surprise downstream parsers expecting child content. Pre-populate empty objects with placeholder values if the consuming system requires non-empty elements.
Unicode and the XML declaration. If your JSON contains emoji or non-Latin scripts, include the XML declaration with encoding="UTF-8". Most modern XML parsers default to UTF-8, but some legacy systems require the explicit declaration to handle characters beyond ASCII.
Circular references will fail. JSON structures with circular references (object A references B, which references A) will cause a stack overflow during conversion. Our converter detects maximum recursion depth to prevent a browser crash, but the output will be incomplete. Flatten or pre-process circular data before converting.

FAQ

Is my data secure?

Yes. All conversion executes in your browser's JavaScript engine. No data leaves your device — nothing is uploaded, transmitted, or stored on any server. Verify by opening Developer Tools (F12), navigating to the Network tab, and clicking Convert. You will see exactly zero network requests.

What's the maximum JSON file size?

Files up to 10 MB convert responsively in most browsers. Above that, performance depends on your device's available memory and the JSON's nesting depth. Deeply recursive structures consume more stack space than flat ones. For production pipelines processing very large files, consider splitting your data into batches.

Can I convert XML back to JSON?

Yes — use our XML to JSON converter for the reverse operation. The round-trip is not perfectly lossless: XML attributes (detected via @ prefix) may not survive a round-trip unchanged, and mixed content patterns in XML have no exact JSON equivalent.

How do I control element naming for array items?

The parent key determines the repeating element name. "customers": [...] produces <customer> elements — the converter automatically singularizes the key. For irregular plurals ("people" → "person", "children" → "child"), use a singular key name in your JSON if you need precise control over the output element tags.

How do I decide between attributes and child elements?

Use @-prefixed keys for metadata about the element itself — identifiers (@id), types (@type), references (@href). Use regular keys for data that belongs to the element — names, values, descriptions. This mirrors the XML design principle: attributes describe the element, child elements contain the data.