Deadline JSON-to-CSV conversion: check the critical columns

When converting JSON to CSV under a deadline, choose the required columns first and verify the source is valid JSON. Export a copy, then check row count, header order, and fields that drive the task. Inspect at least one row with commas or quotes and one with missing values. Open the CSV in the application the recipient will use, since spreadsheet software may reinterpret dates or long numbers. Keep the original JSON for a correction.