Many production systems still exchange XML while modern web applications expect JSON. This converter bridges that gap with fast XML-to-JSON and JSON-to-XML transformation designed for practical integration tasks.
The tool supports nested nodes, arrays, and element attributes so you can move data between formats without manually rewriting structures. Conversion happens entirely in your browser to protect sensitive payloads, contracts, and internal documents.
How to convert XML and JSON
- Paste XML or JSON into the input field.
- Choose auto-detect or force a specific conversion direction.
- Review converted output and inspect structure or attributes.
- Copy the output for use in your API, script, or integration pipeline.
Example Conversion
Alice true {
"user": {
"@attributes": { "id": "1" },
"name": "Alice",
"active": "true"
}
}XML Namespace Handling in Conversion
XML namespaces allow elements from different vocabularies to coexist in the same document without name collisions. An element like
Three common strategies exist. Stripping namespaces entirely removes all prefixes and xmlns declarations, producing cleaner JSON but losing the ability to distinguish between identically-named elements from different vocabularies. Preserving prefixes keeps the colon-separated names like soap:Envelope as JSON keys, which maintains readability but creates keys that are unusual in JSON conventions.
Flattening namespaces into a metadata object is the most complete approach. Each element gets a namespace URI stored alongside its value, similar to how attributes are handled. This preserves all information but produces verbose JSON that is harder to work with manually.
For most practical use cases, stripping namespaces works when you are converting a single-vocabulary document. When the XML mixes multiple schemas, such as SOAP envelopes containing XHTML content, preserving namespace information becomes essential to avoid ambiguity.
Information Loss in Format Conversion
XML and JSON are not equivalent in expressiveness. Several XML features have no direct JSON counterpart, and information is inevitably lost or transformed during conversion.
XML attributes have no parallel in JSON. Most converters use a convention like @attributes or prefix attribute names with @ to distinguish them from child elements. This works for round-tripping but changes the data structure in ways that consuming code must account for.
Processing instructions () carry metadata about how the document should be processed. JSON has no equivalent concept, and these instructions are typically discarded during conversion.
CDATA sections () allow embedding unescaped text in XML. When converted to JSON, the content becomes a regular string, and the distinction between CDATA and normal text content is lost.
XML comments are almost always stripped during conversion. Mixed content, where an element contains both text and child elements interleaved, is particularly problematic because JSON objects cannot naturally represent the ordering of mixed text and element nodes.
Understanding these limitations helps you anticipate issues. If round-trip fidelity is critical, consider whether the XML features you rely on survive the conversion process.