🔧 JSON Formatter & Validator

Format, validate, and beautify JSON data instantly • Free online tool • No signup required

Input JSON
Output

What is a JSON Formatter?

A JSON formatter is an online tool that helps developers format, validate, and beautify JSON (JavaScript Object Notation) data. JSON is the most widely used data format for APIs, configuration files, and data exchange between web applications.

Why Use Our JSON Formatter?

Working with minified or unformatted JSON can be challenging and error-prone. Our free JSON formatter helps you:

  • Format JSON instantly - Convert minified JSON into readable, properly indented format
  • Validate JSON syntax - Detect errors with detailed error messages showing exactly where the problem is
  • Minify JSON - Compress JSON by removing unnecessary whitespace for production
  • Debug API responses - Quickly understand complex JSON structures from API calls
  • Copy formatted output - One-click copy to clipboard for easy pasting

How to Format JSON Online

Using our JSON formatter is simple:

  1. Paste your JSON data into the input field on the left
  2. Click "Format & Beautify" to format your JSON with proper indentation
  3. Click "Validate" to check for syntax errors in your JSON
  4. Click "Minify" to compress your JSON for production use
  5. Click "Copy" to copy the formatted output to your clipboard

Common JSON Formatting Use Cases

  • API Development - Format API responses for easier debugging and testing
  • Configuration Files - Validate and format JSON configuration files
  • Data Analysis - Make complex JSON data structures easier to understand
  • Learning JSON - Understand JSON structure and syntax better
  • Code Review - Present JSON data in a readable format for team review

Privacy and Security

All JSON formatting and validation happens directly in your browser. Your data never leaves your device and is not stored on any server, ensuring complete privacy and security for sensitive data.

✨ Format & Beautify

Transform minified JSON into readable, properly indented format instantly.

✓ Validate JSON

Detect syntax errors with detailed error messages and line numbers.

⚡ Minify

Compress JSON by removing whitespace for production use.

🌙 Dark Mode

Automatically adapts to your system's color scheme preference.