Lesson 4 of 68 minFormat, Validate, and Debug
Compare JSON Versions
JSON diffing helps you spot changed fields, missing values, and API response regressions.
Core concepts
- Compare before and after payloads.
- Look for changed keys.
- Missing fields can break integrations.
- Diffs are useful in reviews.
Example
Before: { "plan": "free", "active": true }
After: { "plan": "pro", "active": true }Practice
Create two small JSON objects and change one field. Use a diff tool to find the exact change.
Checklist
- Compare complete objects.
- Check missing keys.
- Check changed data types.
- Review nested values carefully.
Quiz
When is a JSON diff most useful?