Compare two JSON documents and see every changed path without uploading private payloads.
Maintained by Roshan.
Objects are compared by key, arrays by position, and every difference is reported with a JSON path. Key order does not create false changes.
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Browse all developer and data toolsA JSON diff answers a more useful question than a text diff: what changed in the data? Two API responses can contain the same object keys in a different order and look completely different line by line even though they mean the same thing. Conversely, one value can change from the number 1 to the string "1" and look harmless while breaking validation or application logic. This tool parses both documents first, then walks their actual structure. Objects are matched by key, arrays are compared by position, and each result carries a JSON-style path such as $.customer.address.city or $.items[3].price. Added keys, removed keys, changed values, and changed types are counted separately, so a large response can be reviewed from a compact list instead of by scanning two walls of text. Both documents remain in browser memory and are never posted to a comparison service.
Put yesterday's response on the left and the new deployment's response on the right. A renamed property appears as one removal and one addition, while a number accidentally serialized as text is called out as a type change at the exact path.
Compare the committed configuration with the proposed version. Reordered keys disappear as noise, leaving changed feature flags, added endpoints, removed permissions, and modified nested values in a focused list.
A path-aware diff separates expected event-specific values from an unexpected missing field. Because processing is local, customer identifiers and internal URLs do not need to be copied into a third-party diff service.
No. Object keys are matched by name, so reformatting or reordering an object does not create changes. Array order does matter because JSON arrays define values by their position.
Changed means both values have the same JSON type but different content, such as 10 becoming 12. Type changed means the category differs, such as the number 10 becoming the string "10", an object becoming an array, or a value becoming null.
No. Parsing and recursive comparison happen in browser memory. This page does not call an API with your JSON; you can verify that in the browser Network panel.
This first version accepts pasted JSON so the two inputs remain explicit and easy to edit. A local file picker can be added later without changing the comparison engine or introducing an upload.
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