JSON Diff Checker
Paste two JSON objects and see differences highlighted side-by-side. Useful for API response comparison, config auditing, and data debugging.
Why use a JSON Diff tool?
Manually comparing two JSON objects is tedious and error-prone, especially with deeply nested structures. JSON Diff automatically traverses both objects and highlights every added, removed, and changed key — at every nesting level — so you can review config changes, API response deltas, or migration diffs in seconds. Combine it with the JSON formatter and JSON validator for a complete developer workflow.
Deep comparison
Recursively compares nested objects and arrays — no matter how deep the structure — and reports the full dotted path to each difference.
Color-coded output
Added keys are green, removed keys are red, and changed values are yellow — giving you instant visual clarity.
Summary stats
The diff header shows totals for added, removed, and changed fields so you can assess the scope of changes at a glance.
Diff result types explained
Every diff result falls into one of four categories. Knowing what each means helps you triage changes quickly.
| Result type | Indicator | Color | Meaning |
|---|---|---|---|
| Added | + | Green | Key exists in JSON B but not in JSON A |
| Removed | - | Red | Key exists in JSON A but has been deleted from JSON B |
| Changed | ~ | Yellow | Key exists in both but the value has been modified |
| Unchanged | (not shown) | Gray | Key and value are identical in both JSON objects |