Why convert XML to JSON?
XML was the dominant data format for APIs and config files through the 2000s. Most modern systems have moved to JSON — it's more compact, human-readable, and natively supported in JavaScript and virtually every programming language. Common reasons to convert:
- SOAP APIs — legacy enterprise APIs return XML responses; convert to JSON for modern front-end consumption
- RSS / Atom feeds — news feeds and podcasts use XML; convert to JSON for easier parsing
- Config migration — moving from XML-based config (Maven, Ant, Spring) to JSON/YAML equivalents
- Data transformation — normalizing mixed-format data into a consistent JSON pipeline
How XML maps to JSON
- Elements — become JSON keys; their text content becomes the value
- Attributes — included with an
@_prefix (e.g.@_id) to distinguish from child elements - Repeated elements — automatically grouped into JSON arrays
- Numbers and booleans — auto-parsed from string to their native JSON types
- Nested elements — become nested JSON objects
XML vs JSON at a glance
- Verbosity — XML uses opening and closing tags; JSON uses braces and brackets. The same data is typically 30–50% smaller in JSON.
- Schema — XML has XSD for strict schema validation; JSON has JSON Schema (less mature but widely used)
- Comments — XML supports comments; JSON does not (use JSONC or JSON5 if needed)
- Attributes — XML has a native attribute concept; JSON has no equivalent (keys are keys)