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JSON JavaScript object notation

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JSON is a text-based format that is language-independent, meaning that it can be used to exchange data between different programming languages. JSON stands for JavaScript Object Notation.

{ } //Empty JSON object

It is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate.

{ string : value, .......}

JSON syntax is based on a subset of the JavaScript language syntax. Here are the basic rules for JSON syntax:

  1. Data is represented as key-value pairs, separated by a colon.
  2. Each key-value pair is separated by a comma.
  3. Data is enclosed in curly braces {} to represent an object.
  4. String values are enclosed in double quotes "".
  5. Numeric values are not enclosed in quotes.
  6. Boolean values are represented as either true or false.
  7. Null values are represented as the keyword null.
  8. Arrays are represented as comma-separated lists of values enclosed in square brackets

JavaScript has a built-in function for converting JSON strings into JavaScript objects: JSON.parse()


And for converting aJSON: JSON.stringify()


JSON JavaScript object notation example

Simple HTML example code has an object with several key-value pairs, including a nested object (address) and an array of objects (phoneNumbers). The keys are strings enclosed in double quotes, and the values can be strings, numbers, booleans, objects, or arrays.

<!DOCTYPE html>

  <script >
    var json_obj = {
        "name": "John",
        "age": 30,
        "isStudent": true,
        "grades": [85, 90, 92],
        "address": {
            "street": "123 Main St",
            "city": "Anytown",
            "state": "CA",
            "zip": "12345"
        "phoneNumbers": [
            "type": "home",
            "number": "555-1234"
            "type": "work",
            "number": "555-5678"




JSON JavaScript object notation

Do comment if you have any doubts or suggestions on this JS object notation topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

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