XML vs JSON: Differences, Examples and When To Use Each
XML and JSON are both formats for storing and exchanging structured data. JSON is usually shorter and common in modern APIs, while XML is more document-focused and supports features such as attributes, namespaces and schemas.
- Use JSON for most modern web APIs and JavaScript applications.
- Use XML when you need schemas, namespaces, attributes or document-style data.
- JSON is usually shorter and easier to parse.
- XML is more verbose but can describe complex documents very clearly.
What is XML?
XML stands for Extensible Markup Language. It uses custom tags to describe structured data.
<book>
<title>How to Clean Floors</title>
<author>Jane Smith</author>
<year>1922</year>
</book>XML is often used in feeds, configuration files, document formats and enterprise integrations.
What is JSON?
JSON stands for JavaScript Object Notation. It represents data using objects, arrays, strings, numbers, booleans and null values.
{
"title": "How to Clean Floors",
"author": "Jane Smith",
"year": 1922
}JSON is widely used in modern APIs because it is compact, readable and maps naturally to JavaScript data structures.
Main differences between XML and JSON
| Feature | XML | JSON |
|---|---|---|
| Format style | Tag-based markup | Key-value data format |
| Readability | Readable but more verbose | Usually shorter and easier to scan |
| Attributes | Supported | Not directly supported |
| Namespaces | Supported | Not built in |
| Schema validation | Supported with XSD and related technologies | Supported with JSON Schema |
| Common usage | Enterprise systems, feeds, documents, SOAP | Web APIs, apps, configuration, frontend data |
When should you use JSON?
JSON is usually the better choice when you are building modern web applications, REST APIs or frontend features that need to exchange structured data quickly.
- Modern REST APIs
- JavaScript and TypeScript applications
- Mobile app APIs
- Simple configuration files
- Data returned from web services
When should you use XML?
XML is useful when the data is document-like, needs strict validation, or must support features such as attributes and namespaces.
- SOAP services
- RSS and Atom feeds
- Enterprise integrations
- Document formats
- Systems that require XSD validation
XML vs JSON example
Here is the same book data shown in both XML and JSON.
XML version
<book id="101">
<title>How to Clean Floors</title>
<author>Jane Smith</author>
</book>JSON version
{
"id": 101,
"title": "How to Clean Floors",
"author": "Jane Smith"
}In this simple example, JSON is shorter. XML becomes more useful when the structure needs attributes, namespaces or document-style markup.
XML and JSON pros and cons
| Format | Advantages | Disadvantages |
|---|---|---|
| XML | Supports attributes, namespaces, schemas and document-style structures | More verbose and often larger than JSON |
| JSON | Compact, simple, popular in APIs and easy to use with JavaScript | No native attributes or namespaces |
Format XML or JSON online
Use CheeseBridge tools to format, inspect, convert and clean up XML or JSON in your browser.
Open XML Formatter Open XML Viewer Open JSON Formatter Open JSON Viewer Open XML to JSON Converter Open JSON to XML ConverterTrusted references
For official and technical references, see:
Frequently asked questions
Is JSON better than XML?
JSON is often better for modern web APIs because it is shorter and easier to use with JavaScript. XML can be better when data needs schemas, namespaces, attributes or document-style structure.
Is XML still used?
Yes. XML is still used in enterprise systems, RSS feeds, SOAP services, configuration files and document formats.
Can XML be converted to JSON?
Yes. XML can often be converted to JSON, but attributes, namespaces and repeated elements need to be handled carefully.