JSON Formatter

Format and validate JSON with readable indentation and clear parse errors.

Input

How json formatter works

JSON.parse validates the input and JSON.stringify writes it with two-space indentation.

Enter your values or text in the tool form.
Review the result as you change the inputs, or select the action button for code tools.
Copy the result or download it where a download option is available.

A compact object becomes a readable indented object with one property per line.

JSON requires double-quoted keys and does not allow comments or trailing commas. Very large integers can lose numeric precision.

How does json formatter work?

JSON.parse validates the input and JSON.stringify writes it with two-space indentation.

What should I check before using the result?

JSON requires double-quoted keys and does not allow comments or trailing commas. Very large integers can lose numeric precision.

Is JSON Formatter free to use?

Yes. JSON Formatter is free, browser-based, and does not require signup.

Does this tool save my data?

Tool inputs are processed on your device. File tools do not upload your files. Website analytics are described in the privacy policy.

Can I use it on mobile?

Yes. The page is responsive and works on modern mobile, tablet, and desktop browsers.

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Reviewed 2026-10-24. By Mahad and Mehdi Developers.