ETEvoraTools
XML & YAML Tools

XML to JSON

XML to JSON uses fast-xml-parser with attributes retained under @-prefixed names, then prints the object. XML and JSON data models do not align uniquely: repeated elements can become arrays, mixed content/order may be surprising, and namespaces are not turned into a semantic schema. No XSD validation, XPath, canonicalization, or reversible mapping is provided.

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#xml#json#convert
Quick answer

How are XML attributes represented?

Their keys use an @ prefix.

XML-to-object mapping is a convention

Elements, attributes, text, namespaces, order, and mixed content require explicit mapping rules.

How it works

XMLParser uses ignoreAttributes=false and @ prefix; JSON.stringify emits two-space output.

Key concepts

Attributes get @ keys

This is a library convention.

Repeated elements may be arrays

Multiplicity affects output shape.

When to use it

  • Inspect a simple XML document.
  • Create a JSON debugging view.
  • Convert controlled XML under this convention.

When not to use it

  • Do not expect exact round trips.
  • Do not rely on it for XSD validity.
  • Do not assume mixed-content order preservation.

Worked examples

Attribute

Input
<item id="1">A</item>
Expected output
Object with @id

Configured convention.

Repeated

Input
<r><x>1</x><x>2</x></r>
Expected output
x array

Occurrences affect type.

Mixed

Input
<p>Hello <b>x</b> world</p>
Expected output
Nontrivial shape

Ordered mixed content is complex.

Common mistakes

Guessing shape

Multiplicity changes types. Correction: Test representative XML.

Ignoring namespaces

Names stay lexical keys. Correction: Apply namespace-aware logic.

Calling it validation

No XSD is used. Correction: Validate separately.

Best practices

  • Test attributes, repeats, empties, and mixed content.
  • Document the mapping.
  • Validate production XML.

Related operations and differences

JSON to XML

Choose JSON to XML when you need to convert JSON objects into formatted XML.; use XML to JSON specifically for xml to json.

CSV to JSON

Choose CSV to JSON when you need to convert a header-based CSV table to JSON.; use XML to JSON specifically for xml to json.

JSON to CSV

Choose JSON to CSV when you need to convert an array of JSON objects to CSV.; use XML to JSON specifically for xml to json.

JSON to YAML

Choose JSON to YAML when you need to convert JSON data into readable YAML.; use XML to JSON specifically for xml to json.

YAML to JSON

Choose YAML to JSON when you need to convert YAML data into formatted JSON.; use XML to JSON specifically for xml to json.

CSV to TSV

Choose CSV to TSV when you need to convert comma-separated data to tab-separated data.; use XML to JSON specifically for xml to json.

Limitations and privacy

  • No XSD/DTD validation, XPath, namespace semantics, canonicalization, streaming, mapping controls, or guaranteed round trip.

The pasted data is parsed and transformed locally in this browser.

Frequently asked questions

Are attributes ignored?

No.

Is XSD applied?

No.

Can repeated tags become arrays?

Yes.

Is conversion reversible?

Not reliably.

References