What indentation options are available?

You can choose between 2 spaces (compact) and 4 spaces (expanded) indentation. The default is 2 spaces.

What happens with invalid JSON?

The tool shows a clear error message with details about the parse error, helping you locate and fix the issue in your JSON.

Does it preserve the order of keys?

Yes. JSON.stringify preserves the insertion order of object keys, so your formatted output will maintain the same key order as your input.

JSON Formatter

Format JSON with proper indentation and validate syntax. Highlights the exact line when errors are found. Choose between 2-space or 4-space indent for beautifully formatted output. Runs entirely in your browser — your data never leaves your device.

Indentation

2 spaces4 spaces

Your files are processed entirely in your browser. Nothing is uploaded to any server.

How to Use JSON Formatter

1
Paste or type your text
Enter your text in the input area. You can paste from clipboard or type directly.
2
See instant results
The tool processes your text automatically as you type. Adjust options if available.
3
Copy the output
Click the copy button to save the result to your clipboard. No data leaves your browser.

Frequently Asked Questions

Next Steps

Validate the formatted JSON

Minify for production use

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