Json Validator | Online Json Validator and Formatter

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. Although it is based on a subset of JavaScript syntax, it is language-independent and widely used for data transmission between servers and web applications, as well as for configuration files.

Features of JSON

Lightweight: Minimal syntax and structure.
Human-Readable: Easy to understand and write.
Language-Independent: Supported by almost all programming languages.
Flexible: Supports complex nested data structures (arrays, objects).

JSON Syntax

1. Objects

{
  "key1": "value1",
  "key2": 123,
  "key3": true,
  "key4": {
    "nestedKey": "nestedValue"
  }
}

2. Arrays

{
  "hobbies": ["reading", "traveling", "swimming"]
}

3. Values

String: Enclosed in double quotes.
Number: Integers or floating-point numbers (e.g., 42, 3.14).
Boolean: true or false.
Null: Represents an empty value (null).
Object: A collection of key-value pairs.
Array: An ordered list of values.

Example Combining All

{
  "name": "John",
  "age": 30,
  "married": false,
  "children": null,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  },
  "hobbies": ["reading", "traveling"],
  "skills": [
    { "name": "Programming", "level": "Advanced" },
    { "name": "Public Speaking", "level": "Intermediate" }
  ]
}

JSON Use Cases

Data Exchange: API communication between servers and clients.
Configuration Files: Store app settings and configurations.
Database Storage: Many NoSQL databases use JSON for data storage.
Serialization: Converting objects to JSON for saving or transmitting.

Advantages of JSON

Simple Syntax: Easier to understand than XML.
Compact: Less verbose compared to XML.
Widely Supported: Libraries available in almost every language.
Human-Readable: Easy for developers to debug and edit.