Difference Between JSON and XML

Last Updated : 4 Aug, 2026

JSON (JavaScript Object Notation) and XML (eXtensible Markup Language) are two widely used data formats for storing and exchanging information between applications. JSON is lightweight and commonly used in REST APIs, while XML provides a structured format with advanced features, making it suitable for SOAP web services and enterprise applications.

  • Both JSON and XML are used to exchange data between applications.
  • JSON is lightweight and easy to parse, whereas XML is more structured and extensible.
  • JSON is commonly used in REST APIs, while XML is widely used in SOAP services and document-based systems

JSON (JavaScript Object Notation)

JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format used to store and exchange data between applications. It represents data using key-value pairs, making it easy for both humans and machines to read and process.

  • Lightweight, compact, and fast to parse.
  • Commo nly used in REST APIs, web applications, and mobile applications.
JavaScript 
{"Geeks":[ 
    { "firstName":"Vivek", "lastName":"Kothari" }, 
    { "firstName":"Suraj", "lastName":"Kumar" }, 
    { "firstName":"John", "lastName":"Smith" }, 
    { "firstName":"Peter", "lastName":"Gregory" } 
]}

When Use JSON

  • Developing REST APIs or modern web applications.
  • Fast data exchange and simple parsing are required.
  • Bandwidth and performance are important.

XML (Extensible Markup Language)

XML (Extensible Markup Language) is a text-based markup language used to store, organize, and exchange structured data. It represents information using custom tags and supports advanced features such as namespaces and schemas.

  • Uses custom tags to organize data.
  • Supports hierarchical structures, namespaces, and XML schemas.
  • Commonly used in SOAP web services, configuration files, and enterprise systems.
XML 
<Geeks> 
    <Geek> 
        <firstName>Vivek</firstName> <lastName>Kothari</lastName> 
    </Geek> 
    <Geek> 
        <firstName>Suraj</firstName> <lastName>Kumar</lastName> 
    </Geek> 
    <Geek> 
        <firstName>John</firstName> <lastName>Smith</lastName> 
    </Geek> 
    <Geek> 
        <firstName>Peter</firstName> <lastName>Gregory</lastName> 
    </Geek> 
</Geeks>

When Use XML

  • Working with SOAP web services.
  • Data validation and extensibility are required.
  • Integrating with enterprise or legacy systems.

JSON vs XML

JSONXML
Stands for JavaScript Object Notation.Stands for Extensible Markup Language.
Lightweight, text-based data interchange format.Text-based markup language for storing and exchanging data.
Based on JavaScript object syntax but is language-independent.Derived from SGML (Standard Generalized Markup Language).
Uses key-value pairs.Uses custom tags.
Does not support namespaces.Supports namespaces.
Supports arrays natively.Does not have a native array type; repeated elements are used instead.
Easier to read, write, and parse.More verbose and comparatively harder to read.
Does not use closing tags.Uses opening and closing tags.
Faster and generally requires less bandwidth.Larger in size and generally slower to parse.
Does not officially support comments.Supports comments using <!-- -->.
Uses Unicode encoding (commonly UTF-8).Supports multiple character encodings such as UTF-8 and UTF-16.
Commonly used in REST APIs, web applications, and mobile applications.Commonly used in SOAP web services, configuration files, and enterprise applications.
Comment

Explore