JSON to XML Converter — Convert JSON to XML Online Free
Convert JSON to well-formed XML using AI. Generates valid XML with proper tags, nesting, and attributes from any JSON object or array. Free, no sign-up.
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JSON to XML Converter — Convert JSON to XML Online Free
About JSON to XML Converter — Convert JSON to XML Online Free
JSON to XML converts your JSON objects and arrays into well-formed XML documents, mapping JSON types to appropriate XML elements and handling nested structures, arrays, and special characters automatically. Developers use it when integrating with legacy systems, SOAP APIs, or any XML-first pipeline that cannot consume JSON directly.
JSON to XML Type Mapping
| JSON Type | Example Input | XML Output |
|---|---|---|
| String | "name": "Alice" | <name>Alice</name> |
| Number | "age": 30 | <age>30</age> |
| Boolean | "active": true | <active>true</active> |
| Null | "ref": null | <ref/> |
| Object | "address": {"city": "NY"} | <address><city>NY</city></address> |
| Array item | "tags": ["a","b"] | <tags><item>a</item><item>b</item></tags> |
| Root object | { "user": {} } | <root><user/></root> |
JSON vs XML Format Comparison
| Feature | JSON | XML |
|---|---|---|
| Human readability | High — minimal syntax | Moderate — verbose tags |
| Schema validation | JSON Schema | XSD, DTD, RelaxNG |
| Namespace support | None native | Full namespace support |
| Attributes | Not supported | Supported natively |
| Comments | Not supported | Supported |
| Data types | String, number, bool, null, array, object | All represented as text; typed via XSD |
| SOAP API compatibility | No | Yes |
| Browser/JS parsing | JSON.parse() | DOMParser / XMLSerializer |
| File size | Smaller | Larger (tag overhead) |
Frequently Asked Questions
How are JSON arrays converted to XML?
Each element in a JSON array is wrapped in a repeated child element. By convention, the wrapper tag uses the parent key name and each item gets an <item> tag (e.g., a "colors" array produces <colors><item>red</item><item>blue</item></colors>). Some converters let you configure the item element name. Nested objects inside arrays are recursively expanded as child elements.
What happens to JSON keys that contain spaces or special characters in XML?
XML element names cannot contain spaces, start with a digit, or include characters like &, <, or >. Most converters sanitize invalid characters by replacing spaces with underscores and stripping or encoding disallowed characters. Always validate the output XML if your source JSON keys use non-alphanumeric characters, since different tools handle edge cases differently.
How do I add XML attributes instead of child elements when converting from JSON?
Standard JSON has no concept of XML attributes, so plain key-value pairs map to child elements by default. Some converters support a convention where keys prefixed with @ (e.g., "@id") are emitted as XML attributes rather than child elements. If you need attribute control, check whether your converter supports the BadgerFish or Parker convention, or post-process the XML with an XSLT transform.
Does JSON to XML conversion preserve the root element name?
JSON objects have no inherent root element name, so most converters wrap the output in a default root tag such as <root> or <object>. You can usually specify a custom root element name as an option. If your JSON is a single top-level object with one key, some converters use that key as the root element name automatically.
How do I convert JSON to XML in JavaScript without a library?
You can write a recursive function that iterates object keys and builds XML strings, but handling arrays, null values, and special characters correctly requires care. For production use, libraries like fast-xml-parser or xml-js handle edge cases and are available via npm. For a quick one-off in Node.js: const { json2xml } = require('xml-js'); const xml = json2xml(JSON.stringify(data), { compact: true, spaces: 2 });
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