JSON ↔ XML Converter

Convert between JSON and XML formats in both directions.

What Does the JSON ↔ XML Converter Do?

This converter translates data between the two most widely used interchange formats — in both directions. JSON → XML wraps your objects and arrays in well-formed, indented XML elements with a proper declaration. XML → JSON parses any well-formed XML document and produces structured JSON, preserving attributes (prefixed with @), repeated elements (converted to arrays) and text content, while automatically casting numbers and booleans to native JSON types.

How to Use the Converter

  1. Pick a direction with the JSON → XML / XML → JSON tabs.
  2. Paste your source document into the left box.
  3. Click Convert — the result appears on the right, or a clear error message explains what is malformed.
  4. Copy the output with one click.

Conversion Rules Worth Knowing

  • Arrays — a JSON array becomes repeated XML elements of the same name; repeated XML elements become a JSON array.
  • Attributes — XML attributes appear in JSON as keys prefixed with @ (e.g. "@id": "5"), so no information is lost.
  • Root element — XML requires exactly one root. If your JSON has multiple top-level keys, the converter wraps them in a <root> element.
  • Invalid tag names — JSON keys that are not legal XML names (spaces, leading digits) are sanitized with underscores.

This tool is a lifesaver when integrating modern JSON APIs with legacy SOAP/XML systems, migrating configuration between platforms, or transforming data feeds for tools that only accept one of the two formats.

Frequently Asked Questions

Why does my XML output start with a <root> element?

XML documents must have exactly one root element. When your JSON has several top-level keys or is an array, the converter adds a <root> wrapper to keep the output valid.

How are XML attributes represented in JSON?

As keys prefixed with @. <book id="5"> becomes {"@id": 5, …}, and element text alongside attributes is stored under "#text". This round-trips cleanly back to XML.

Are numbers converted to real JSON numbers?

Yes — when converting XML to JSON, values that look like numbers or true/false are cast to native JSON types instead of staying quoted strings.

Is the conversion lossless?

Structure and data are preserved in both directions. The one caveat: XML features with no JSON equivalent (comments, processing instructions, CDATA markers) are not carried across.