XML to JSON Converter

What Does an XML to JSON Converter Do?

An XML to JSON converter parses an XML document and creates a JSON representation of its elements, attributes, text, and repeated structures. This can make XML data easier to inspect and use in JavaScript applications, APIs, scripts, and modern data-processing workflows.

XML and JSON do not have identical data models. XML distinguishes elements, attributes, namespaces, text nodes, comments, processing instructions, ordering, and mixed content, while JSON represents objects, arrays, strings, numbers, booleans, and null. A converter therefore needs mapping conventions, and the result may not be a lossless reproduction of every XML feature.

Common Use Cases

• API integration: Convert XML responses into JSON for frontend applications or JavaScript-based processing.
• Legacy system modernization: Use JSON internally while continuing to consume XML from older services.
• Data inspection: View deeply nested XML as JSON objects and arrays during debugging or development.
• Configuration conversion: Transform XML configuration data into a JSON structure for a tool or application that accepts JSON.
• Data migration: Prepare XML records for processing by JSON-based libraries, scripts, or storage systems.

How to Convert XML to JSON

1. Enter XML: Paste the XML document or open a .xml file.
2. Choose formatting: Select 2 or 4 spaces for JSON indentation.
3. Configure attributes: Choose a prefix such as @ or @_ to distinguish XML attributes from child elements.
4. Choose text handling: Preserve text under a dedicated key when the document contains attributes, child elements, or mixed content.
5. Convert and inspect: Generate the JSON and check attributes, repeated tags, text values, namespaces, and nested structures.
6. Copy or download: Copy the JSON or save it as a .json file for later use.

How XML Elements Map to JSON

• Elements: XML elements commonly become JSON object properties.
• Nested elements: Child elements commonly become nested JSON objects.
• Attributes: Attributes can become properties with a prefix such as @id or @_id.
• Text values: Simple element text may become a string value, while text beside attributes or child nodes may require a key such as #text.
• Repeated elements: Repeated sibling tags are commonly represented as JSON arrays.
• CDATA: CDATA content is generally treated as text because JSON has no native CDATA type.

Attributes and Text Nodes

XML permits an element to contain both attributes and text:

<name priority="high">Alice</name>

A common JSON representation is:

{"name":{"@priority":"high","#text":"Alice"}}

The exact keys depend on the converter's configuration. A configurable attribute prefix helps prevent collisions between an attribute and a child element with the same name. A dedicated text key helps preserve text content when a simple string value is not enough.

Repeated Elements and Array Ambiguity

When several sibling elements share the same tag, a converter can represent them as a JSON array:

<items>
  <item>A</item>
  <item>B</item>
</items>

One challenge is the difference between a single element and a repeated element. Some converters return a scalar or object for one occurrence and an array only when multiple occurrences exist. Other converters force selected element names to always use arrays. Check the output shape if your application expects a stable schema.

Namespaces, CDATA, and Mixed Content

XML namespaces do not have a direct JSON equivalent. A converter may preserve prefixes in property names, remove prefixes, or expose namespace declarations separately. CDATA markers are usually removed while their content is retained as text. Mixed content, where text appears between child elements, can be difficult to represent without preserving order explicitly.

For SOAP, SVG, SAML, RSS, Atom, or other namespace-heavy documents, test a representative sample and verify that the output retains the information your application actually needs.

XML to JSON Is Not Always Reversible

Converting XML to JSON and then converting the result back to XML may produce a structurally similar document, but not necessarily the original document. Comments, whitespace, attribute order, namespace declarations, CDATA markers, document formatting, and mixed-content order may change or disappear. Keep the original XML if exact reconstruction matters.

Common XML Conversion Errors

• Unclosed tags: Every opening element must have a matching closing element unless it is self-closing.
• Invalid nesting: XML elements must be properly nested.
• Unescaped ampersands: A literal ampersand in text usually needs to be written as &.
• Malformed attributes: Attribute values need valid quotation marks.
• Unexpected namespaces: Namespace declarations and prefixes may affect the output keys.
• Unstable arrays: A single repeated-element occurrence may produce a different JSON shape from multiple occurrences.

Browser-Based Privacy

This converter is designed to parse XML and generate JSON in the browser instead of sending the source document to a remote conversion service. That can be useful for development data and private integration samples. It is not a substitute for secure secret management, so avoid entering credentials, tokens, private customer information, or production secrets into any online converter.

When to Use a Local XML Tool

A browser-based converter is convenient for one-off transformations and inspection. For repeatable automation, very large files, confidential documents, CI pipelines, or strict schema requirements, use a trusted local library or command-line tool and define the XML-to-JSON mapping explicitly.