JSON Diff Checker
Compare two JSON documents and list added, removed and changed keys.
Quick answer: enter your details below and click Compare JSON — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Developer
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How to use
- Paste the first JSON document.
- Paste the second JSON document.
- Click Compare JSON and read the added, removed and changed lists.
About this tool
When a configuration or API response changes, the difference is often buried in a long document. This tool compares two JSON documents recursively, key by key and index by index, and lists what was added, what was removed and what changed, with the path to each item. Either document being invalid JSON is reported with a clear error instead of a partial comparison.
Frequently asked questions
Does key order matter in the comparison?
No. Objects are compared by key name, so reordering keys alone produces no differences.
How are arrays compared?
By position: items at the same index are compared, and extra items at the end are listed as added or removed.