JSON Diff / Compare

Unlike a plain text diff, JSON Diff compares two documents by structure rather than by line: it understands that key order in an object doesn't matter, and it shows the exact path (e.g. user.address.city) to every difference.

How to use it

• Paste the original JSON into one field and the new version into the other.
• The result lists added, removed, and changed fields with the exact path to each and its old and new value.
• Formatting and key order don't affect the result — only the underlying data structure is compared.

Common uses

• Checking exactly what changed in an API response between two versions or two requests.
• Comparing configuration files (package.json, app settings) across branches or environments.
• Debugging a failing test by precisely comparing the expected and actual JSON output.

Things to keep in mind

Array elements are usually compared by position (index) — inserting one element near the start can show every following item as "changed", even though they merely shifted.

The comparison is structural, not textual — two JSON documents with identical data but different formatting or key order are treated as the same.