About

This tool transforms Extensible Markup Language (XML) into JavaScript Object Notation (JSON) using a strictly client-side parsing engine. Unlike server-based converters, this tool utilizes the browser's native DOMParser API, ensuring that your sensitive data never leaves your device. It handles complex nested structures, attributes, and mixed content nodes with engineering precision.

The conversion algorithm addresses the fundamental structural mismatch between the two formats: XML is document-centric (nodes, attributes, text), while JSON is data-centric (objects, arrays, values). To bridge this, our engine applies a heuristic allowing attributes to become properties and repeated tags to implicitly form arrays, minimizing data loss and preserving hierarchy.

Formulas

The core recursive mapping logic follows these transformation rules:

For any node N:

{

IF isText(N) → valueIF hasAttributes(N) → { "@attr": val, ... }IF count(child) > 1 → [ obj1, obj2 ]

When a node contains both text content and attributes, the text is mapped to a special property #text to preserve the structure.

Reference Data

Feature	XML (Extensible Markup Language)	JSON (JS Object Notation)
Structure	Tree-based (DOM)	Map/List-based
Metadata	Attributes (@id="1")	None (Must be fields)
Comments	Supported (<!-- -->)	Not Standard
Verbosity	High (Closing tags required)	Low (Compact syntax)
Parsing Speed	Slower (Complex lexical analysis)	Faster (Native JS mapping)
Schema	XSD / DTD	JSON Schema
Data Types	Strings (mostly)	String, Number, Bool, Null, Array

Frequently Asked Questions

Attributes are converted into keys within the JSON object. By default, they are prefixed (e.g., "@id" or '_id') to distinguish them from child tags. You can configure this prefix in the settings panel to match your preferred schema.

Yes. CDATA sections, which allow characters like "<" and "&" to be included without escaping, are extracted as raw string values and merged into the resulting JSON property, identical to standard text nodes.

This usually happens if the "Always Array" option is enabled. Standard behavior converts repeated tags (siblings with the same name) into arrays. However, strict schemas often require lists to remain arrays even when they contain only one item. Our "Force Arrays" setting ensures consistency for API consumption.

No. This tool uses the "DOMParser" interface built into your web browser. The XML string is parsed in memory on your device, guaranteeing zero latency and absolute data privacy.