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JSON Diff

Compare two JSON documents structurally, entirely in your browser.

How it works

  1. Paste the original JSON on the left and the changed JSON on the right.
  2. Click Compare.
  3. Both are normalized (sorted keys, consistent indentation) before comparing, then shown as a line diff.

Frequently asked questions

Is my JSON sent anywhere?
No. The comparison runs entirely on your device.
Does key order matter?
No — both documents are normalized (keys sorted, consistently indented) before comparing, so re-ordering keys alone won't show up as a difference.
What if one of the inputs isn't valid JSON?
You'll see a clear parse error identifying which side failed, instead of a confusing diff.