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What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It is easy to read and write for humans and easy to parse for machines.

Why JSON is Important

• Widely used in APIs
• Lightweight and fast
• Language-independent
• Easy to read and write

Basic JSON Structure

JSON is built using key-value pairs:

{
  "name": "John",
  "age": 30,
  "isStudent": false
}

JSON Data Types

• String
• Number
• Boolean
• Array
• Object
• null

JSON Example with Array

{
  "users": [
    { "name": "Alice", "age": 25 },
    { "name": "Bob", "age": 28 }
  ]
}

Where JSON is Used

• Web APIs
• Configuration files
• Data storage
• Frontend-backend communication

Common JSON Errors

• Missing commas
• Incorrect quotes (must use double quotes)
• Trailing commas

Tools to Work with JSON

You can use online tools to format and compare JSON easily:

• JSON Viewer
• JSON Diff Tool

Conclusion

JSON is a simple yet powerful format that is essential for modern web development. Understanding JSON is a must-have skill for developers.