Indent:
Click Format to see output here...How to use
01
Paste your JSON
Drop messy or minified JSON into the input box.
02
Click Format
We parse and re-stringify with your chosen indent level.
03
Copy the result
Use the Copy button or paste it back into your code.
Why JSON Formatter
- Runs entirely in your browser, your data never leaves your device.
- Catches parse errors with the exact problem location.
- Adjustable 2-space, 4-space, or tab indentation.
- No file size limit beyond your browser memory.
Common questions
Is my JSON sent to a server?
No. All parsing happens in your browser using JSON.parse.
Can I minify with this tool?
Use our JSON Minifier for one-line output.
Does it support JSON5 or trailing commas?
No. We strictly validate JSON per RFC 8259 to catch real bugs.
Is JSON Formatter free to use?
Yes. JSON Formatter is completely free. There is no sign up, no trial, and no usage cap.
Do I need an account to use JSON Formatter?
No. You can start using JSON Formatter straight away. We do not ask for an email address or a login.
Is my data uploaded to a server when I use JSON Formatter?
No. JSON Formatter runs entirely inside your browser, so the code or data you enter never leaves your device and nothing is sent to us.
Do you store the code or data I use with JSON Formatter?
No. Because everything happens locally in your browser, there is nothing for us to store. Close the tab and it is gone.
Can I paste minified or messy code into JSON Formatter?
Yes. JSON Formatter handles compact, minified, or untidy input and processes it the same way.
Does JSON Formatter flag errors in my input?
Where it applies, JSON Formatter points out where something looks invalid so you can fix it quickly.
How do I use JSON Formatter?
Enter or paste your code or data and JSON Formatter updates the result as you go. When it looks right, copy or download it with one click.
Does JSON Formatter work on phones and tablets?
Yes. JSON Formatter is responsive and works in any modern browser on mobile, tablet, and desktop.
Which browsers does JSON Formatter support?
It works in current versions of Chrome, Firefox, Safari, and Edge. For the best experience, keep your browser up to date.
Is there a limit on how often I can use JSON Formatter?
No. You can use JSON Formatter as many times as you need, at no cost.
Can I use JSON Formatter for commercial or client work?
Yes. You are free to use the output in personal, educational, and commercial projects.
Why is JSON Formatter free?
The site is supported by advertising, which lets us keep every tool free and open to everyone.
What should I do if JSON Formatter gives an unexpected result?
First check that your code or data is formatted as expected. If something still looks wrong, use the feedback link on the page and we will take a look.