Key capabilities
- Match object arrays by id, key, or another stable field
- JSON Schema validation with error path location
- Two-way field merging and three-way conflict resolution
- Export JSON Patch and Merge Patch
JSON Diff
Compare large JSON locally in the background with keyed object-array matching, three-way merging, JSON Schema validation, and a complete Patch workflow.
Waiting for valid JSON
532 B total input
BeforeValid17 lines
AfterValid19 lines
Structural differences0 Modified0 Type0 Added0 Removed0 / 0
0 / 0
The JSON values are identical under the current rules
About JSON Diff
Compare JSON structurally and merge fields. Compare large JSON locally in the background with keyed object-array matching, three-way merging, JSON Schema validation, and a complete Patch workflow. The core workflow is designed to run in your current browser.
Useful for
- API response regression comparison
- Configuration and environment differences
- Test fixture and snapshot updates
Frequently asked questions
Is JSON Diff free to use online?
Yes. JSON Diff opens in a modern browser and does not require desktop software installation.
What is JSON Diff useful for?
Common use cases include API response regression comparison; Configuration and environment differences.
Is my input or file uploaded?
The core processing workflow is designed to run locally in the browser. Key capabilities include Match object arrays by id, key, or another stable field, JSON Schema validation with error path location, Two-way field merging and three-way conflict resolution; account, comments, and anonymous analytics may still create normal site requests.
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