JSON Formatter

What is JSON?

JSON is the most widely used data format for web APIs, configuration files, and data storage. It consists of:

• Objects: Unordered collections of key-value pairs enclosed in curly braces {...}
• Arrays: Ordered lists of values enclosed in square brackets [...]
• Values: Strings, numbers, booleans (true/false), null, objects, or arrays
• Keys: Always strings enclosed in double quotes

JSON Syntax Rules

{
  "name": "John Doe",
  "age": 30,
  "isActive": true,
  "email": null,
  "skills": ["JavaScript", "Python", "Go"],
  "address": {
    "city": "New York",
    "zip": "10001"
  }
}

Why Format JSON?

Why Minify JSON?

Minification removes all unnecessary whitespace from JSON, reducing file size:

• Faster transmission: Smaller payload means faster API responses and reduced bandwidth
• Storage efficiency: Minified JSON takes less space in databases and logs
• Production optimization: Configuration files in production should be minified

Common Use Cases

• API Development: Format responses from REST or GraphQL APIs for debugging
• Configuration Files: Clean up package.json, tsconfig.json, or other config files
• Database Queries: Format MongoDB documents or PostgreSQL JSON columns
• Log Analysis: Make structured logs readable for troubleshooting
• Code Reviews: Share formatted JSON snippets in pull requests

Working with JSON in Code

// Parse JSON string to object
const data = JSON.parse('{"name": "John"}');

// Convert object to formatted JSON string
const formatted = JSON.stringify(data, null, 2);

// Minify JSON
const minified = JSON.stringify(data);

import json

# Parse JSON
data = json.loads('{"name": "John"}')

# Format JSON
formatted = json.dumps(data, indent=2)

# Minify JSON
minified = json.dumps(data, separators=(',', ':'))

Common JSON Errors