About This Tool
The JSON Formatter & Validator is a free online tool that helps developers format, validate, and minify JSON data instantly. Whether you’re debugging API responses, cleaning up configuration files, or working with JSON-based data, this tool provides a clean, readable output with syntax highlighting.
How to Use
- Paste your JSON data into the input area
- Click Format JSON to pretty-print with indentation
- Click Minify to compress to a single line
- Use the indent selector to choose between 2 spaces, 4 spaces, or tabs
- Click Copy Output to copy the result to your clipboard
FAQ
Does this tool validate JSON?
Yes. If your JSON is invalid, the tool will display a detailed error message showing what went wrong and where the error occurred.
Is my data sent to any server?
No. All processing happens entirely in your browser. Your data never leaves your device.
What is the maximum JSON size supported?
The tool works with any JSON that your browser can handle — typically up to several megabytes without any issues.
