JSON Compare & Diff

The JSON Compare tool lets you compare two JSON documents online and get a structural, semantic diff rather than a naive text comparison. This JSON comparator ignores key order and whitespace and instead reports exactly which properties were added, removed, or changed, and where. That makes it ideal for spotting the real differences between two JSON files, API responses, config versions, or fixtures.

• Semantic comparison that ignores key order and formatting
• Clearly labels added, removed, and changed values
• Reports the full path to each difference, including array indices
• Distinguishes a type change from a value change
• Optional key sorting and normalization before comparing
• Handles deeply nested objects and large arrays

1. 1

   Paste the original JSON

   Add the first document into the left side as your baseline.

2. 2

   Paste the updated JSON

   Add the second document into the right side to compare against.

3. 3

   Review the diff

   See every added, removed, and changed value with its exact path.

4. 4

   Act on the changes

   Use the structured diff to confirm expected updates or catch regressions.

• Confirming what changed between two versions of an API response
• Diffing config files across environments like staging and production
• Verifying that a data migration only altered the intended fields
• Comparing a test fixture against actual output to debug failures
• Reviewing changes in a JSON document without noisy formatting diffs