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JSON Diff Viewer
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Paste two JSON documents and click Compare to see a structural diff. Added keys are highlighted green, removed keys red, and changed values show both old and new. Nested objects are diffed recursively so you can drill into any level of the hierarchy. A stats bar summarizes the total number of additions, removals, and changes. Copy the unified diff to clipboard for sharing. All processing runs in your browser - no data is uploaded.
How to Use
- 1Paste the original JSON in the left panel
- 2Paste the modified JSON in the right panel
- 3Click Compare - the diff appears below with color-coded additions (green), removals (red), and nested changes (yellow)
- 4Use the Copy Diff button to copy the result as plain text
Features
- Recursive structural diff - compares nested objects and arrays at any depth
- Color-coded output: green for added, red for removed, yellow ~ for changed nested keys
- Summary stats bar: total added, removed, and changed keys
- Ignore key order - compares by structure, not by insertion order
- Copy the entire diff as plain text with + / − prefixes
- Clear error messages for invalid JSON on either side
- 100% browser-based - no data uploaded
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