JSON <> XML Converter

Convert data structures seamlessly between JSON and XML with client-side recursive parsing.

JSON <> XML Converter

JSON Data
XML Data

Bridging JSON and XML in Modern Systems

Software engineers frequently navigate between modern JSON-based microservices and legacy enterprise systems relying on XML (Extensible Markup Language). Whether integrating with legacy SOAP web services, banking mainframes, government tax compliance APIs (such as NF-e / SPED), or enterprise message brokers, reliable translation between JSON and XML is essential.

While both formats model hierarchical data, their conceptual foundations differ substantially. XML is document-centric, allowing element attributes, namespaces, and mixed text content. JSON is data-object-centric, natively supporting arrays, booleans, and null primitives without verbose tag syntax.

Private Client-Side Processing All conversion logic utilizes native browser DOM parsers (DOMParser) and recursive object traversal. None of your sensitive customer payloads, SOAP envelopes, or XML configs are transmitted to external servers.

Conversion Mapping Rules

JSON Data Type XML Equivalent Representation Conversion Behavior
Key-Value Object Enclosing tags: <key>value</key> Keys become XML node names; values become inner text or child nodes.
Arrays / Lists Repeating identical element tags Each element in the JSON array is wrapped in tags named after the property.
Numbers & Booleans String text nodes Primitives are converted to literal text strings (e.g. <active>true</active>).
Null Values Empty or self-closing tags Rendered as <tag/> or omitted based on schema requirements.

Code Integration Example: Python Conversion

When implementing bidirectional conversion in your backend pipeline, libraries like xmltodict mirror our client-side logic:

import json
import xmltodict

# JSON to XML
def convert_json_to_xml(json_str: str) -> str:
    data = json.loads(json_str)
    # Ensure a single root node exists
    if len(data.keys()) > 1 or isinstance(data, list):
        data = {"root": data}
    return xmltodict.unparse(data, pretty=True)

# XML to JSON
def convert_xml_to_json(xml_str: str) -> str:
    parsed_dict = xmltodict.parse(xml_str)
    return json.dumps(parsed_dict, indent=4)

Frequently Asked Questions

Why are my XML tags wrapped in <root>?
According to the W3C XML standard, every valid XML document must have exactly one root element. If your JSON input has multiple top-level keys or begins as an array, our tool automatically encloses the structure inside a standard <root> container.
How are XML attributes handled during XML to JSON conversion?
XML attributes are extracted into a special @attributes object property inside the corresponding JSON node, preserving all attribute keys and values without colliding with child element tags.