JSON vs XML: Differences, Examples and When To Use Each
JSON and XML are both used to store and exchange structured data. JSON is usually shorter and common in modern APIs, while XML is more verbose but supports features such as attributes, namespaces and schemas.
- Use JSON for most modern APIs, apps and JavaScript-based systems.
- Use XML when you need attributes, namespaces, schemas or document-style data.
- JSON is usually smaller and easier to read.
- XML is more verbose but very structured and flexible.
What is JSON?
JSON stands for JavaScript Object Notation. It stores data using objects, arrays and key-value pairs.
{
"name": "Jane Smith",
"role": "Chief Cheese Tester",
"active": true
}
JSON is popular because it is compact, readable and works naturally with JavaScript and many modern APIs.
What is XML?
XML stands for Extensible Markup Language. It stores data using custom tags.
<employee>
<name>Jane Smith</name>
<role>Chief Cheese Tester</role>
<active>true</active>
</employee>
XML is often used in enterprise integrations, feeds, document formats, SOAP services and systems that need stricter structure.
Main differences between JSON and XML
| Feature | JSON | XML |
|---|---|---|
| Format style | Key-value data format | Tag-based markup |
| Readability | Usually shorter and easier to scan | Readable but more verbose |
| Attributes | No separate attribute system | Supports attributes |
| Namespaces | Not built in | Supported |
| Validation | Can use JSON Schema | Can use XSD and related technologies |
| Common use | APIs, apps, frontend data, configuration | Enterprise systems, feeds, SOAP, documents |
Same data in JSON and XML
Here is the same employee data in both formats.
JSON version
{
"employee": {
"id": 101,
"name": "Mia Cheese",
"role": "Bridge Snack Coordinator"
}
}
XML version
<employee id="101">
<name>Mia Cheese</name>
<role>Bridge Snack Coordinator</role>
</employee>
JSON is usually more compact. XML can be clearer when attributes, namespaces or document-style markup are needed.
When should you use JSON?
JSON is usually the better choice for modern applications and APIs.
- REST APIs
- JavaScript and TypeScript applications
- Frontend data loading
- Mobile app APIs
- Simple configuration files
- Data exchanged between modern web services
When should you use XML?
XML is useful when data needs more formal structure or document-style features.
- SOAP services
- RSS and Atom feeds
- Enterprise integrations
- Document formats
- Systems that require XSD validation
- Data that needs namespaces or attributes
JSON pros and cons
| Advantages | Disadvantages |
|---|---|
| Compact and readable | No native attribute system |
| Easy to parse in many languages | No built-in namespace support |
| Excellent for APIs | Not ideal for mixed document content |
XML pros and cons
| Advantages | Disadvantages |
|---|---|
| Supports attributes and namespaces | More verbose than JSON |
| Strong schema validation with XSD | Can be harder to read at scale |
| Good for document-style structures | Usually larger payloads |
Can JSON and XML be converted?
Yes. JSON and XML can often be converted, but conversion is not always perfect because they model data differently.
XML attributes, namespaces, repeated elements and mixed text content can require special handling when converting into JSON.
Format or convert JSON and XML online
Use CheeseBridge tools to format, view and convert JSON and XML directly in your browser.
Open JSON Formatter Open JSON Viewer Open XML Formatter 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 APIs and web apps because it is shorter and easy to parse. XML can be better when attributes, namespaces, schemas or document-style structures are needed.
Is XML still used?
Yes. XML is still used in enterprise systems, SOAP services, RSS feeds, 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.