What is JSON? A Beginner's Guide

JSON (JavaScript Object Notation) is a lightweight data format for storing and exchanging structured data. Despite its name, JSON is language-independent and used by Python, Java, Go, and virtually every modern programming language.

JSON Structure

JSON represents data as objects (key-value pairs wrapped in curly braces) and arrays (ordered lists in square brackets). Values can be strings, numbers, booleans, null, objects, or arrays. Keys must be double-quoted strings.

Example: {"name": "Alice", "age": 30, "active": true, "tags": ["dev", "api"]}.

Why JSON Dominates APIs

JSON is human-readable, compact compared to XML, and maps naturally to native data structures in most languages. REST APIs overwhelmingly use JSON for request and response bodies.

Use WaiHub's JSON Formatter to validate, beautify, and debug JSON during API development.