Compare two JSON documents in the browser with a side-by-side normalized diff.
JSON Comparison Tool
Compare two JSON documents side-by-side after stable key normalization.
JSON A
JSON B
Privacy note: JSON comparison runs only in your browser. We do not send, store, or share your data.
JSON A
JSON B
Why JSON Diffs Matter
When APIs evolve, small JSON changes can break clients: renamed keys, new nested fields, changed value types, or missing properties. A readable JSON diff helps catch these quickly.
What To Look For
- Added or removed keys in nested objects.
- Value changes that look minor but affect behavior.
- Array element order changes that may impact consumers.
Team Workflow Tip
Use a JSON comparer during code review and QA to validate contract changes before release, especially for public APIs and event payloads.