JSON Diff Checker

Comparing two JSON documents with a plain text diff is frustrating, because text diffs care about things JSON doesn't: key order, indentation, trailing commas, whitespace. Reorder two keys and a text diff screams that everything changed, when structurally nothing did. This tool diffs JSON the way it should be done — by parsing both sides and comparing the actual data structure, so only real differences show up.

The result is a precise, path-addressed list: every key that was added (present in the new but not the old), removed (in the old but not the new), or changed (different value), with the full dotted path to each — config.port, features[2], user.address.city. Changed values show the before and after side by side. Nesting is followed to any depth, and arrays are compared element by element with index paths.

This is the tool for the everyday questions: what changed between two API responses, what's different between two config files, what a colleague actually modified in that settings JSON, whether two exports are truly equivalent. When the documents match, it says so clearly rather than leaving you to scan an empty result. Both documents are parsed and compared entirely in your browser — API responses and config files, which often carry sensitive data, never leave your device.