About the JSON Diff

The JSON Diff is a free online tool that lets you compare two JSON values (line diff of formatted output) — so you can format, convert and debug without installing anything. Everything runs locally in your browser, so it is fast, completely private, and works even when you are offline.

Whether you are a developer, tester or student, the JSON Diff gives you instant results with no installation, no account and no limits.

How to use the JSON Diff

  1. Paste or type your content into the input box on the left.
  2. Click the action button for what you need.
  3. Copy the result from the output box, or download it as a file.

Frequently asked questions

Is the JSON Diff free to use?

Yes. The JSON Diff is completely free with no sign-up, no usage limits and no watermarks. Use it as many times as you like.

Is my data safe and private?

Absolutely. The JSON Diff processes everything inside your browser — your input is never uploaded to any server, so your data stays 100% private.

Does this run completely offline?

Yes. All processing happens in your browser using JavaScript, so once the page has loaded you can keep using it with no internet connection — and none of your code or data is ever sent to a server.

Do I need to install anything or use it on mobile?

No installation needed. The JSON Diff works in any modern browser on desktop, tablet and mobile.

What does the JSON Diff do?

It helps you compare two JSON values (line diff of formatted output) quickly and accurately, with a clean interface and one-click copy or download of the result.

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