What is JSON

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.

JSON example

The following is a simple example of JSON formatted text:

{
  "name": "Simon Willison",
  "age": 25,
  "height": 1.68,
  "urls": [
    "http://simonwillison.net/",
    "http://www.flickr.com/photos/simon/",
    "http://simon.incutio.com/"
   ]
}
Compared to XML, JSON format is much more readable by humans and it is also much more easy to write.