JSON Diff Tool Online
Compare two JSON objects side by side and see exactly what changed.
Paste JSON on both sides to compare, or:
Left: { "v": "1.0", "theme": "light" } Right: { "v": "2.0", "theme": "dark" }Compare JSON Objects Online
Our JSON Diff tool lets you compare two JSON objects and see every difference at a glance. It highlights added keys, removed keys, and changed values with color coding. Perfect for comparing API responses, config changes, or debugging data transformations.
Why Compare JSON Files?
When debugging APIs, you often need to compare responses before and after a change. Manually reading through JSON to spot differences is error-prone. A diff tool instantly shows you every addition, removal, and modification so you can focus on what actually changed.
How to Diff JSON Online
Paste the original JSON on the left and the modified version on the right. Click "Compare" to see a color-coded report: green for added fields, red for removed, and yellow for changed values. Use "Swap" to flip the sides.
Common Use Cases for JSON Comparison
- API debugging – Compare responses before and after code changes to isolate regressions
- Config management – Diff staging vs production config files to ensure correct settings
- Code review – Compare JSON fixtures or mock data across pull requests
- Data migration – Verify exported data matches the original after transformations
- Version tracking – See exactly what changed between two versions of a JSON schema or document