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On-device · nothing uploaded

Format and check JSON

Tidy, indent and check JSON so it is easy to read, and see mistakes with line numbers. Free, private, nothing uploaded.

How it works, privately

How it works, privately

  1. The tool opens right here. There is nothing to install and no account to make.
  2. Paste your JSON. It is tidied and checked as you type.
  3. What you type stays in this browser on this device. Nothing is sent to a server.

Questions

Is it free?
Yes. JSON, YAML & XML is free to use, with no account, no sign-up and no daily limit.
Is what I type sent anywhere?
No. JSON, YAML & XML runs inside your browser, on your own device. Nothing you type or make is sent to a server.
Does it work on my phone?
Yes. It works in an up-to-date browser on phones, tablets and computers. Very big files are quicker on a computer.
Do I need to install anything?
No. Open the page and use it. You can also add Toolbox to your home screen like an app.