JSON Formatter

JSON (JavaScript Object Notation) is the most widely used data format for APIs and configuration files. When JSON is minified — stripped of whitespace and line breaks — it becomes nearly impossible to read. A JSON formatter parses the raw string, validates its syntax, and re-outputs it with consistent indentation.

This tool uses your browser's built-in JSON.parse() and JSON.stringify() methods with a 2-space indent. If the JSON is invalid, you'll see the exact syntax error and its position, making it easy to debug malformed API responses or config files. Common errors include trailing commas, single quotes instead of double quotes, and unescaped special characters.

Minification does the reverse — it strips all unnecessary whitespace to reduce payload size. This is useful when embedding JSON in URLs, localStorage, or HTTP headers where every byte counts. All processing happens entirely in your browser — no data is sent to any server.