JSON Formatter & Beautifier

Online JSON Formatter and Validator

The CSV-X JSON Formatter is a free online tool for formatting, beautifying, and minifying JSON (JavaScript Object Notation) data. Whether you are debugging API responses, editing configuration files, or preparing data for documentation, properly formatted JSON is essential for readability and accuracy. This tool instantly transforms compact, single-line JSON into a well-indented, easy-to-read format, or compresses verbose JSON into minified form to reduce file size.

The formatter offers two indentation options: 2 spaces (commonly used in JavaScript and TypeScript projects) and 4 spaces (popular in Python and Java ecosystems). The minify function removes all unnecessary whitespace, producing the most compact representation of your data. This is useful for reducing payload sizes in APIs, configuration files, and data transfers. The tool also validates your JSON input, clearly indicating any syntax errors so you can quickly identify and fix issues like missing commas, unmatched brackets, or incorrect quoting.

Developer-Friendly Features

The side-by-side input and output layout makes it easy to compare your original JSON with the formatted result. The copy button lets you quickly transfer the formatted output to your clipboard for pasting into your code editor, terminal, or documentation. The formatter handles all valid JSON types including objects, arrays, strings, numbers, booleans, and null values. All processing happens in your browser using native JavaScript JSON.parse and JSON.stringify functions, ensuring fast performance and complete privacy.