What is JSON Diff?
JSON Diff compares two JSON objects structurally and highlights differences in values, added keys, removed keys, and type changes. Unlike text diff, it understands JSON structure, so reordered keys won't show as different if values are the same.
Common Use Cases
API Testing
Compare expected vs actual API responses during testing.
Config Changes
Track changes in JSON configuration files.
Data Validation
Verify data transformations preserve or modify expected values.
Debugging
Find unexpected changes in JSON data structures.
How to Use This Tool
- Paste the original JSON in the left panel
- Paste the modified JSON in the right panel
- View structural differences highlighted
- See added, removed, and changed values
Frequently Asked Questions
Does key order matter?
No. JSON objects with the same keys and values but different order are considered equal.
What about array order?
Yes, array order matters. [1,2] and [2,1] are considered different.
Can it compare large files?
Yes, but very large files may be slower to process. The tool handles typical JSON sizes well.