How to Use JSON in JavaScript

📘 How to Use JSON

JSON (JavaScript Object Notation) is a lightweight data format that is easy for both humans and machines to understand. It has become the standard for exchanging data between frontend and backend applications.

{
  "name": "Gianluca",
  "age": 30,
  "skills": ["JavaScript", "Vue", "Nuxt"]
}

🔍 Why JSON is Useful

• Works across all programming languages
• Readable and writable by both developers and tools
• Perfect for APIs, config files, and local storage

🛠 Recommended Tools

• 1. JSONLint

  A powerful online validator to check if your JSON is correct.

• 2. Code Beautify JSON Viewer

  Visualize, edit and format JSON in a structured way.

• 3. Postman

  Send and test JSON APIs with ease, great for developers.

• 4. JQ Playground

  Filter and manipulate JSON using the jq command-line language.

📤 Sending JSON via JavaScript

fetch('/api/data', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ name: 'Gianluca', age: 30 })
})

📥 Reading JSON in JavaScript

const json = '{"name":"Gianluca","age":30}';
const obj = JSON.parse(json);
console.log(obj.name); // "Gianluca"

✅ Conclusion

Mastering JSON is fundamental in modern web development. Whether you're working on frontend or backend, knowing how to structure and handle JSON can dramatically improve your efficiency and data quality.