JSON to XML Converter

[
  { "id": 1, "name": "Ada", "address": { "city": "London" }, "tags": ["math", "code"] },
  { "id": 2, "name": "Grace", "address": { "city": "New York" }, "active": true }
]

<?xml version="1.0" encoding="UTF-8"?>
<root>
  <item>
    <id>1</id>
    <name>Ada</name>
    <address>
      <city>London</city>
    </address>
    <tags>math</tags>
    <tags>code</tags>
  </item>
  <item>
    <id>2</id>
    <name>Grace</name>
    <address>
      <city>New York</city>
    </address>
    <active>true</active>
  </item>
</root>

The single root rule

XML allows only one top-level element. If the JSON is an object with one key, that key is the root. Otherwise the output is wrapped in the root element you choose.

Arrays

A key holding an array becomes one repeated element per value. A top-level array uses the array item name for each entry.

Attributes

Keys starting with @ become attributes and #text becomes element text, matching what the XML to JSON page produces.

Invalid element names

XML names can't contain spaces or start with a digit, so such keys are adjusted: "1 bad" becomes _1_bad. A note reports how many keys changed.

Null values

A null becomes an empty element.

import json, xmltodict

with open("in.json", encoding="utf-8") as f:
    data = json.load(f)
print(xmltodict.unparse({"root": data}, pretty=True))