JSON Formatter & Minifier

What is JSON formatting and minifying?

JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format. Formatting (pretty-printing) adds consistent 2-space indentation and line breaks to make nested objects and arrays readable for debugging and review.

Minification strips all unnecessary whitespace and line breaks, producing a compact single-line payload ideal for HTTP transmission, database storage, and caching. All formatting and validation happens strictly in your browser runtime; nothing is uploaded.

Format and minify JSON in code

JavaScript

// Format with 2 spaces
const formatted = JSON.stringify(JSON.parse(raw), null, 2);
// Minify to single line
const minified = JSON.stringify(JSON.parse(raw));

Python

import json
data = json.loads(raw)
formatted = json.dumps(data, indent=2)
minified = json.dumps(data, separators=(',', ':'))