Free JSON to XML / XML to JSON Converter

How this tool computes its result

Uses fast-xml-parser library for bidirectional conversion. JSON -> XML: parses JSON, wraps in a root element if not already present (via ensureSingleRoot), then builds XML via XMLBuilder with attributes prefixed as @_. XML -> JSON: parses XML with XMLParser (preserving attributes as @_-prefixed keys), then stringifies to formatted JSON. Both directions handle well-formed input; malformed input surfaces library errors.

Worked example

JSON {"product":{"name":"Item","price":100,"@_id":"SKU123"}} converts to XML with attribute id="SKU123" and nested name/price elements. XML <product id="SKU123"><name>Item</name><price>100</price></product> converts to the JSON above (attribute becomes @_id key).

When not to use this tool

This handles well-formed XML/JSON only - it does not repair malformed XML, does not handle CDATA sections specially, and does not preserve XML comments or processing instructions; for complex XML workflows, use a dedicated XML editor or XSLT tool.

Common mistakes

• - Pasting JSON without a single root object (e.g., loose array or multiple top-level objects) - the tool wraps it in a root element, but the resulting XML may not match your schema; ensure your JSON has a natural root.
• - Expecting attribute vs element distinction to be preserved losslessly - XML attributes become @_-prefixed keys in JSON, and vice versa; round-tripping may alter the structure if you mix attributes and elements in ways the tool doesn't preserve.
• - Assuming namespaces are handled - the tool does not recognize or preserve XML namespace prefixes (xmlns); pass-through conversion may lose namespace information.

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