JSON to CSV: When It Works Well and When It Gets Messy
Understand the best JSON shape for CSV conversion and how nested values are handled.
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The best input shape
CSV conversion works best with an array of objects where each object represents one row.
The converter can use all discovered object keys as table headers, then write each object as a row under those headers.
Nested objects and arrays
CSV is flat, while JSON can be deeply nested. When an object contains another object or array, the nested value usually needs to be stringified.
For production exports, decide whether nested fields should stay compact or be expanded into separate columns before sharing the file.