First, create a JavaScript string containing JSON syntax: Then, use the JavaScript built-in function JSON.parse() to convert the string into a JavaScript object: Finally, use the new JavaScript object in your page: You can read more about JSON in our JSON tutorial.

JSON is a syntax for serializing objects, arrays, numbers, strings, booleans, and null. It is based upon JavaScript syntax, but is distinct from JavaScript: most of JavaScript is not JSON. For example: Objects and Arrays. Property names must be double-quoted strings; trailing commas are forbidden. Numbers. Leading zeros are prohibited.

Apr 11, 2025 · JSON is a text-based data format following JavaScript object syntax. It represents structured data as a string, which is useful when you want to transmit data across a network. Even though it closely resembles JavaScript object literal syntax, it …

The JSON syntax is derived from JavaScript object notation, but the JSON format is text only. Code for reading and generating JSON exists in many programming languages. The JSON format was originally specified by Douglas Crockford. Why Use JSON? The JSON format is syntactically similar to the code for creating JavaScript objects.

Dec 14, 2024 · You can use the JSON.parse() method to convert a JSON string into a JavaScript object. JavaScript const jsonStr = `{ "emp": [ { "firstName": "Amit", "lastName": "Kumar" }, { "firstName": "Jay", "lastName": "Sharma" }, { "firstName": "Mohit", "lastName": "Patel" } ] }` ; const obj = JSON . parse ( jsonStr ); console . log ( obj . emp [ 1 ...

JSON stands for Javascript Object Notation. JSON is a text-based data format that is used to store and transfer data. For example, "name": "John", "age": 22, "gender": "male", In JSON, the data are in key/value pairs separated by a comma ,. JSON was derived from JavaScript. So, the JSON syntax resembles JavaScript object literal syntax.

Jan 24, 2024 · JavaScript provides methods JSON.stringify to serialize into JSON and JSON.parse to read from JSON. Both methods support transformer functions for smart reading/writing. If an object has toJSON , then it is called by JSON.stringify .

Apr 11, 2025 · JSON syntax. JSON data is represented as key-value pairs, similar to JavaScript objects, enclosed in curly braces {}. Each key is a string wrapped in double quotes, followed by a colon : and its corresponding value. Multiple key-value pairs are separated by commas. Here is an example of a simple JSON object:

JSON in JavaScript is primarily used for data serialization and deserialization. You can convert JavaScript objects to JSON strings and parse JSON strings back into JavaScript objects. JSON objects follow a key-value structure enclosed in curly braces {}. "name": "Alice", "age": 30, "city": "New York" . Keys must be enclosed in double quotes.

Nov 29, 2021 · JSON (J ava S cript O bject N otation) is a text-based data exchange format. It is a collection of key-value pairs where the key must be a string type, and the value can be of any of the following types: A couple of important rules to note: In the JSON data format, the keys must be enclosed in double quotes.