Code Utils - JSON Formatter

About JSON Formatter

This is a free online tool to format, validate, and minify JSON data. All processing happens in your browser - your data is never sent to any server.

How to Use

1. Paste or type your JSON data into the Input field, click "Upload File", or drag & drop a .json file onto the input area
2. Click "Format" to beautify your JSON with proper indentation
3. Click "Minify" to compress JSON into a single line
4. Click "Validate" to check if your JSON is valid
5. Click "Copy Output" to copy the result to clipboard
6. Click "Download" to save the formatted JSON as a file

Keyboard Shortcuts

• Ctrl+Enter (Cmd+Enter on Mac) - Format JSON
• Ctrl+M (Cmd+M on Mac) - Minify JSON
• Ctrl+K (Cmd+K on Mac) - Clear all fields

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is commonly used for transmitting data in web applications.

File Size Limitations

Recommended file sizes for best performance:

• Under 2MB: Works perfectly with instant formatting
• 2-5MB: Works well, may take a few seconds
• 5-10MB: May cause browser slowdown, but usually works
• Over 10MB: Not recommended - may freeze or crash your browser

This tool processes everything in your browser's memory. Very large JSON files may cause performance issues or browser crashes. For files over 10MB, consider using command-line tools or server-based processors.

Privacy & Security

This tool runs entirely in your browser using JavaScript. Your JSON data is never transmitted to any server. All formatting, validation, and minification operations are performed locally on your computer.