Convert JSON to XML online with instant formatting.
Transform raw JSON payloads into well-formed XML documents. Supports attribute mapping (@_), CDATA handling, and pretty-printing. 100% private in-browser with zero server uploads.
<?xml version="1.0" encoding="UTF-8"?> <project name="JSONGlow" status="active"> <metadata> <version>2.4.0</version> <author>JSONGlow Engineering</author> <license>MIT</license> </metadata> <features> <feature id="f-01"> <name>JSON to XML Converter</name> <category>converter</category> <enabled>true</enabled> </feature> <feature id="f-02"> <name>XML to JSON Converter</name> <category>converter</category> <enabled>true</enabled> </feature> </features> </project>
# 21 lines · 538 chars
JSONGlow's JSON to XML converter is a fast, 100% client-side web utility that transforms JSON objects and arrays into structured, compliant XML documents with zero server uploads.
Overview
Why converting JSON to XML remains vital in enterprise systems
Modern APIs and microservices frequently exchange data in JSON, but legacy enterprise architectures, SOAP web services, RSS feeds, Android resource layouts, and financial messaging systems often mandate strict XML schemas.
Translating nested JSON trees to XML by hand is tedious and error-prone, especially when balancing tag closures, XML attribute prefixes (@_), text node values, and self-closing elements. An automated converter produces well-formed XML in milliseconds without structural defects. You can also validate your inputs using our JSON Validator or clean malformed syntax with the JSON Repair Tool.
Unlike cloud conversion websites that send your sensitive database records and API keys to third-party servers, JSONGlow processes all data 100% inside your web browser sandbox using modern client-side Web APIs. Your confidential payloads never leave your computer.
You can toggle between pretty-printed XML and minified single-line outputs, handle custom XML attributes, inspect hierarchical trees, and convert back to JSON with the bidirectional switcher anytime. If you need the opposite direction, explore our dedicated XML to JSON Converter or convert to spreadsheets with JSON to CSV.
Workflow Guide
How to convert JSON to XML in 3 steps
Input your JSON payload
Paste your raw JSON object, array, or API response into the editor panel.
Verify root tags and attributes
Examine the generated XML in real-time. Use '@_attr' notation to define XML element attributes if desired.
One-click copy or file download
Click 'Copy' to copy XML to clipboard or 'Download .xml' to save the file locally.
Practical Demonstration
JSON to XML Transformation
See how JSON objects and nested arrays become structured XML elements.
{
"bookstore": {
"book": [
{
"@_category": "engineering",
"title": "Designing Data-Intensive Applications",
"author": "Martin Kleppmann",
"price": 38.99
},
{
"@_category": "database",
"title": "Database Internals",
"author": "Alex Petrov",
"price": 42.50
}
]
}
}<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
<book category="engineering">
<title>Designing Data-Intensive Applications</title>
<author>Martin Kleppmann</author>
<price>38.99</price>
</book>
<book category="database">
<title>Database Internals</title>
<author>Alex Petrov</author>
<price>42.5</price>
</book>
</bookstore>Troubleshooting & Edge Cases
Common XML conversion pitfalls & how to avoid them
Missing single root element in JSON
Why it happens: XML specifications require exactly one top-level root element. If your JSON has multiple root keys, the converter wraps them in a synthetic '<root>' tag.
{ "response": { "status": "ok" } }Invalid XML tag characters in JSON keys
Why it happens: XML element names cannot contain spaces, start with numbers, or include characters like '!', '@', or '$'.
Arrays of primitives without object wrappers
Why it happens: Direct arrays of numbers or strings (e.g. [1, 2, 3]) have no tag names in JSON, requiring fallback item element tags.
Special XML characters unescaped (<, >, &, ")
Why it happens: Strings containing unescaped ampersands or brackets break XML well-formedness if not converted to XML entities.
Core Capabilities
Engineered for data fidelity & speed
Attribute Mapping (@_)
Seamlessly map JSON properties starting with '@_' to native XML element attributes.
100% Client-Side Privacy
Zero server uploads. All XML generation occurs locally inside browser memory.
Bidirectional ↔ Switch
Swap between JSON to XML and XML to JSON with a single click, keeping your work synchronized.
Automated Entity Escaping
Safely escapes ampersands, angle brackets, and quotation marks into RFC-compliant XML entities.
Formatted & Minified Modes
Toggle between 2-space indented pretty-print and compact single-line XML output.
Instant File Download
Download your converted XML document directly as a .xml file with UTF-8 encoding.
Frequently Asked Questions
Common questions answered.
Need more help? Our tools execute entirely in your browser without transmitting any payload to remote servers.
How does this tool map JSON keys to XML attributes?+
By default, JSONGlow uses the standard '@_' prefix convention. Any JSON key starting with '@_' (such as '@_id': '101') is rendered as an XML element attribute rather than a child element.
Does this JSON to XML converter upload my data?+
No. All conversions execute 100% locally in your browser memory. No network requests are made with your payload content.
Can I convert XML back into JSON?+
Yes. Click the 'Swap XML ↔ JSON' button in the toolbar or visit our dedicated XML to JSON Converter to convert in reverse.
What happens if my JSON has multiple top-level keys?+
XML requires a single root tag. If your JSON object has multiple top-level keys, the engine automatically encapsulates them within a clean '<root>' container element.
How are null values and booleans represented in XML?+
Boolean true/false values are emitted as 'true' or 'false' text nodes. Null values are rendered as self-closing tags (e.g., '<field />').
Is there a limit on JSON payload size?+
Because all parsing is performed directly in client-side memory, there are no artificial server request limits.
Explore More Tools & Guides
The JSONGlow developer kit.
XML to JSON
Convert XML to structured JSON with attribute prefixes, CDATA handling, and typed values.
JSON to YAML
Convert JSON to clean YAML 1.2 manifests for Kubernetes, Helm, Docker Compose, and CI/CD pipelines.
JSON to CSV
Flatten complex nested structures, handle null primitives, and export cleanly to spreadsheet CSV.