JSON XML Converter

What is JSON XML Converter?

A JSON XML converter transforms data between JavaScript Object Notation (JSON) and Extensible Markup Language (XML). JSON is a lightweight, hierarchical format using key-value pairs and arrays. XML is a markup language using tags to define structure and attributes. This converter supports bidirectional conversion: JSON to XML (object keys become element tags, wrapped in a root element) and XML to JSON (elements become keys, attributes are prefixed with @).

How It Works

For JSON to XML, the converter recursively walks the JSON structure: objects become nested XML elements with keys as tag names, arrays produce repeated sibling elements, and scalar values are text content with XML-special characters escaped. The output is wrapped in a <root> element with an XML declaration. For XML to JSON, the browser's native DOMParser parses the XML, then each element is converted to a JSON object with child elements as keys and attributes prefixed with @. All processing is local.

Common Use Cases

• Integrating JSON APIs with legacy systems that require XML
• Converting configuration files between JSON and XML formats
• Preparing data for SOAP web services from modern JSON sources
• Migrating XML-based documentation to JSON-based storage
• Transforming AJAX responses for XML-consuming front-end components

Technical Details

JSON to XML uses recursive descent: null/undefined values produce self-closing tags, arrays emit repeated elements, and text content is escaped for &, <, >, and ". The output includes an XML 1.0 declaration with UTF-8 encoding. XML to JSON uses the browser's DOMParser with 'text/xml' mode and detects parse errors via the parsererror element. Attributes are stored with an @ prefix, text content under #text, and repeated child elements are collected into arrays.