Understanding JSON and XML Conversion
JSON and XML are two of the most widely used data interchange formats. JSON is the dominant format in modern web APIs and JavaScript applications thanks to its lightweight syntax. XML remains essential in enterprise systems, SOAP web services, configuration files, and document formats like SVG and RSS. Converting between them is a common task for developers integrating different systems.
How JSON Maps to XML
Each key in a JSON object becomes an XML element. Nested objects create nested elements. Arrays are handled by repeating the element tag for each item in the array. Primitive values like strings, numbers, and booleans become text content inside their parent element. A root element wraps the entire structure since XML requires a single root node.
How XML Maps to JSON
XML elements become JSON keys. Text-only elements are converted to primitive values where numbers and booleans are automatically detected. When multiple sibling elements share the same tag name, they become a JSON array. XML attributes are preserved using an @ prefix convention. The document root becomes the top-level key in the resulting JSON object.
Common Use Cases
Bridging REST APIs that return JSON with legacy SOAP services that require XML payloads.
Converting XML configuration files to JSON for modern toolchains and vice versa.
Reshaping data between formats for ETL pipelines, reporting systems, and data warehouses.
Turning JSON data into XML feeds like RSS, Atom, or sitemap XML files.
Frequently Asked Questions
How does JSON to XML conversion work?
Each JSON key maps to an XML element. Objects become nested elements, arrays repeat the parent tag for each item, and primitives become text content inside their element.
How does XML to JSON conversion work?
The tool uses DOMParser to parse XML, then recursively walks the tree. Elements become keys, repeated siblings become arrays, and text content is converted to typed values.
Are XML attributes preserved during conversion?
Yes. XML attributes are preserved in the JSON output using an @ prefix convention, e.g. @id, @class.
Can this tool handle large files?
Yes. All processing happens in your browser, so performance depends on your device. Files up to several megabytes convert instantly.
Is my data safe when using this converter?
Absolutely. This tool runs entirely in your browser. No data is uploaded to any server.