Merge Patch Generator
Generate JSON Merge Patch (RFC 7396) documents by comparing original and modified JSON objects. Show exactly what changed. Code never leaves your device — formatting and validation run locally in your browser.
How to Use the Merge Patch Generator
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Frequently Asked Questions
What is Merge Patch?
RFC 7396 JSON diffs — send just the changes instead of whole documents every time.
Arrays handling?
Replaced wholesale, not merged — by design, since element identity is ambiguous.
Diff or full object?
Diffs for bandwidth; full objects for simplicity — the tool builds either.
Are my patches uploaded anywhere?
No — generation runs locally in your browser, free with no signup.
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Last updated October 2026