JSON Formatter & Validator - Free Online JSON Beautifier Tool
Beautify and validate JSON data instantly in your browser
💻 All processing happens in your browser. Your JSON data never leaves your device.
What is JSON Formatter?
JSON Formatter is a free online tool that helps developers beautify, validate, and minify JSON data. Whether you're working with APIs, configuration files, or debugging web applications, this tool makes JSON data human-readable with proper indentation and syntax highlighting. All processing happens locally in your browser, ensuring your sensitive data never leaves your device.
How to Use JSON Formatter
Paste your JSON code into the input field
Click 'Format' to beautify or 'Minify' to compress
Copy the formatted result with one click
Adjust indentation spacing if needed
Key Features
Frequently Asked Questions
Is JSON Formatter free to use?
Yes, this tool is completely free with no limitations on usage or file size. You can format and validate as much JSON data as you need without any registration or payment.
Is my JSON data safe?
Absolutely. All processing happens locally in your browser using JavaScript. Your JSON data is never sent to any server, stored, or shared. It's completely private and secure.
What's the difference between Format and Minify?
Format (beautify) adds indentation, line breaks, and spacing to make JSON human-readable. Minify removes all whitespace and formatting to reduce file size, which is useful for production environments.
Can I validate JSON syntax?
Yes! The tool automatically validates your JSON syntax when you click Format or Minify. If there are any syntax errors, you'll see a detailed error message indicating the problem.
What is the maximum JSON file size?
There's no hard limit on file size. However, very large JSON files (>10MB) may slow down your browser. For best performance, we recommend using files under 5MB.