What Is JSON to XML Conversion?
JSON and XML both describe structured data, but with fundamentally different rules. XML requires exactly one root element wrapping everything else, and distinguishes between attributes (metadata on a tag, like id in <user id="1">) and child elements (nested content), a distinction JSON has no equivalent for since every JSON value is just a key and a value. JSON, by contrast, allows multiple top-level keys and has no concept of attributes at all. Converting between the two means bridging that gap, which is why many JSON to XML converter tools produce technically invalid XML for ordinary JSON input, missing the single-root requirement entirely. Teams convert between the formats most often when a modern JSON-based service needs to talk to an older SOAP API, an enterprise system, or a legacy config format that still expects XML.
How to Convert JSON to XML (and Back)
Paste JSON into the left panel and the equivalent XML appears on the right as you type, no button to press. To go the other way, switch the direction toggle to XML to JSON, or hit the swap button between the panels, which flips the direction and moves the current output into the input panel so you can convert it straight back. Every conversion runs through a debounced live pipeline, so a short pause in typing is enough to see the result update.
How the Root Element and Attributes Are Handled
Valid XML has exactly one root element, but ordinary JSON has no such restriction, an object can have any number of top-level keys, or the JSON could be an array or a bare value. To handle this correctly, this json to xml converter checks the shape of your JSON first: if it is already a single-key object, that one key becomes the root element directly and nothing extra is added. If it is an array, a primitive, or an object with more than one top-level key, the whole thing is automatically wrapped in a synthetic <root> element so the output is always valid, well-formed XML. Attributes work the other direction: an XML attribute like the id in <user id="1"> becomes a JSON key prefixed with @_, so {"user": {"@_id": "1"}} round-trips back into the exact same attribute, not a child element.
Common JSON and XML Conversion Errors
Malformed JSON, a missing comma, an unclosed brace, a trailing comma, fails at the same JSON.parse step a script would hit, and the parser error is shown in place of a result. XML errors look different: an unclosed tag, a mismatched closing tag, or invalid characters in a tag name are the most common failures, and the XML parser reports what specifically went wrong so you can find the exact spot to fix.
A Free Tool to Convert JSON to XML Online
This json to xml online free tool needs no signup, so you can convert json to xml online or convert xml to json online whenever a legacy system needs it. As a json xml converter and xml to json converter in one, it works as a json xml conversion tool for round-tripping attributes, and as a general-purpose xml json converter free of any usage limits.