JSON for Beginners

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format. It's easy for humans to read/write and machines to parse/generate. Almost all programming languages support JSON.

JSON Basic Syntax

JSON stores data in key-value pairs, using curly braces for objects and square brackets [] for arrays. Example:

{"name": "John", "age": 25, "skills": ["JavaScript", "Python"]}

Common Errors

• Missing quotes — keys must be double-quoted
• Trailing commas — no comma after last element
• Comments — JSON doesn't support comments
• Single quotes — must use double quotes

Why Format JSON?

Compressed JSON is hard to read. Formatting adds indentation and line breaks, making data structure clear at a glance. Essential for API debugging.

FAQ

What are JSON basics?

Curly braces for objects, square brackets [] for arrays, colons separate keys from values.