Flat arrays work best
A list of objects with the same keys exports cleanly into columns.
Data export
Export JSON arrays into CSV when you need spreadsheet review, QA handoff, import templates, or a quick report from API data.
A list of objects with the same keys exports cleanly into columns.
Nested objects and arrays may need flattening before they become useful spreadsheet fields.
Check the JSON structure before exporting so broken rows do not become confusing CSV columns.