What is JSON Diff Tool?
Free online JSON diff tool. Deep-compare two JSON structures, highlighting added, removed, and modified fields. Perfect for API version comparison and config diff analysis.
Use Cases
- ◆API version diff
- ◆Config comparison
- ◆Data migration verification
- ◆Debug comparison
How to Use
- 1Paste original JSON on the left
- 2Paste modified JSON on the right
- 3Click Compare
- 4View highlighted differences
Features
- ✓Deep comparison
- ✓Highlighted diffs
- ✓Nested object support
- ✓Free
FAQ
Can it compare nested JSON?
Yes, supports arbitrarily deep nested objects and arrays.
Will field order changes be flagged?
No — JSON object key order does not matter; only value changes are flagged.
Does field order matter?
No. JSON objects are unordered by specification. {"a":1,"b":2} and {"b":2,"a":1} are considered identical.
Can it compare nested objects?
Yes. Deep comparison handles arbitrarily nested objects and arrays, showing differences at every level.
Are array element orders compared?
Yes. Arrays are ordered, so [1,2,3] and [1,3,2] are flagged as different.
What is the maximum file size?
Up to 10MB per JSON file. Larger files may cause performance issues in the browser.