JSON to XML Converter
Convert JSON objects and arrays to well-formed XML. Maps JSON keys to XML elements and handles nested structures, arrays, and primitive values with clean, readable XML output.
Converts JSON objects to XML element trees with proper nesting.
Handles arrays by repeating the parent element name for each item.
Wraps output in a root element for well-formed XML compliance.
Supports nested objects, string, number, boolean, and null values.
Useful for integrating JSON-native services with XML-based legacy systems.
How to Use
Paste valid JSON into the input field
The converter maps each key to an XML element
Copy the XML output for use in your SOAP service, config, or data pipeline
Validate the output with an XML validator if strict conformance is required
System Integration
- Bridge REST APIs to SOAP services
- Transform JSON configs to XML app configs
- Feed JSON data into XML pipelines
Data Migration
- Convert JSON exports to XML imports
- Reformat data for legacy enterprise systems
- Prepare XML test fixtures from JSON sources
Enterprise Integration
- SOAP web services
- ESB pipelines
- Legacy ERP systems
- EDI transformations
XML element names cannot start with numbers or contain spaces — rename any JSON keys that would produce invalid XML tags before converting.
JSON arrays are mapped by repeating the parent element; the resulting XML may need post-processing to match a specific XML schema.
Use an XSLT transform after conversion if the target system requires a specific XML structure that differs from the auto-generated layout.
Check JSON key names for XML-invalid characters before converting, especially if keys come from user-generated data.
Validate the XML output against the target XSD if integrating with a strict enterprise system.
For recurring conversions in production, use a server-side library with explicit mapping configuration rather than an ad-hoc converter.
Frequently Asked Questions
Find answers to common questions about our tools and services.
Understanding JSON to XML Converter
JSON and XML represent two philosophically different approaches to data serialization. JSON, introduced in the early 2000s, grew to dominance alongside REST APIs because of its compact syntax, direct mapping to JavaScript objects, and native support in every modern programming language. XML, standardized by the W3C in 1998, predates JSON and remains deeply embedded in enterprise software, SOAP web services, document publishing systems, configuration frameworks, and industries such as healthcare (HL7 FHIR), finance (FIX, XBRL), and government data exchange. The continued co-existence of both formats in modern software architectures makes reliable JSON-to-XML conversion a routine integration task.
The structural mapping from JSON to XML follows a set of agreed conventions. JSON objects become XML element containers: each key-value pair in the object becomes a child element, where the key is the element tag name and the value is its content or further child elements. JSON arrays are expanded by repeating the parent element for each array item — a design choice that preserves the positional data without introducing an artificial wrapper element. JSON primitive values (strings, numbers, booleans) become text content of their parent elements. JSON null is rendered as an empty self-closing element. A root wrapper element is added to satisfy the XML requirement for a single document root.
A practical concern when converting JSON to XML is the difference in valid naming rules between JSON keys and XML element names. XML element names must start with a letter or underscore, cannot contain spaces, and cannot begin with the string "xml" in any capitalization. JSON keys have no such restrictions — they can be arbitrary Unicode strings including spaces, numbers as first characters, and reserved words. When converting JSON with keys that violate XML naming rules, preprocessing the key names is required. Teams working with enterprise XML schemas often define a mapping layer that translates JSON key names to the specific element names required by their XML Schema Definition (XSD).
This JSON to XML converter handles the most common conversion patterns automatically: nested object hierarchies, arrays of objects, mixed-type arrays, and all JSON primitive types. The output is formatted as readable XML with consistent indentation, making it immediately inspectable. The converter validates the JSON input before processing, reporting errors for malformed input rather than producing broken XML. For developers working with enterprise integration patterns — ESBs, API gateways, or ETL pipelines — this tool provides a fast starting point for data mapping, with the understanding that complex XSD-compliant transformations may require additional XSLT processing for full schema compliance.