JSON Diff

A JSON diff tool helps you see exactly what changed between two structured payloads. Instead of visually scanning long objects by hand, you can paste both versions and let the tool highlight additions and removals line by line.

When it is most useful

This is especially helpful when comparing API responses, config revisions, test fixtures, or migration outputs. Since the inputs are normalized before comparison, formatting differences do not distract from the actual data changes.

What the comparison shows

The tool highlights new lines, removed lines, and whether the two JSON objects are identical after normalization. That makes it easier to review behavior changes, debug breaking updates, or confirm whether two payloads are truly equivalent.

Because the diff runs entirely in the browser, it is a quick and private way to inspect sensitive JSON without sending it to an external service.