JSON·Tool

JSON Formatter

Use JSON Formatter online — free, private, and 100% in your browser.

JSON Formatter beautifies and indents messy JSON into a clean, readable structure, with optional key sorting. Everything runs locally in your browser, so your data is never uploaded to any server. It's free, fast, and works on every modern device.

How to use

  1. Paste or type your content into the input box.
  2. Click the matching button to run the conversion.
  3. Copy the result — or tweak the options and run again.

Why use this tool

Frequently Asked Questions

Is JSON Formatter free and private?

Yes. JSON Formatter runs entirely in your browser — your data is never uploaded, and the tool is completely free with no sign-up.

How does JSON Formatter work?

It beautifies and indents messy JSON into a clean, readable structure, with optional key sorting. All processing happens client-side with JavaScript, so it's instant and safe even for sensitive data.

Does it work on mobile and all browsers?

Yes. It works in any modern browser on desktop, tablet, and phone — no installation needed.

Related tools

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