JSON Diff Checker
Compare two JSON files or strings side-by-side to highlight additions, modifications, and deletions.
100% Client-Side (No data leaves your device)
Original JSON (Left)
0 chars
Modified JSON (Right)
0 chars
User Guide: How to Read the JSON Diff Viewer
What is JSON Diffing and Why Check It?
When software integrations fail, differences in API parameters are usually the culprit. Inspecting lines manually is error-prone. The JSON Diff Checker compares original keys against updated ones, highlighting deletions, added structures, and changed parameter values instantly.
Step-by-Step Instructions
- Enter original JSON: Paste your baseline configuration data into the Original JSON (Left) panel.
- Enter updated JSON: Paste the new version into the Modified JSON (Right) panel.
- Compare: Select if keys should be sorted alphabetically, then click Compare JSON Structures.
- Read highlights: Red lines represent removed keys, green lines represent added elements, and amber shows modified parameters. Scrolling either panel automatically locks and translates the scroll coordinates on the opposing side.
Understanding Color Highlights
- Red Highlight: Removed lines. A parameter was deleted in the modified (right) payload.
- Green Highlight: Added lines. A new property exists only in the modified payload.
- Amber Highlight: Modified lines. The key is identical, but the value was modified (e.g. from
truetofalse).
Before & After Diff Preview
Original Input:
{"active": true, "version": "v1"}
Modified Input:
{"active": false, "tags": ["prod"]}
Diff Highlight:
- "active": true | + "active": false - "version": "v1" | (empty space) (empty space) | + "tags": ["prod"]