Basic conversion often fails with nested JSON. If your data is complex, use a library like json-2-csv which handles dot-notation for nested fields automatically.
Adding a Byte Order Mark ( \ufeff ) at the start of your CSV string can help Microsoft Excel recognize UTF-8 encoding correctly. javascript convert json to csv download
async function exportData() try const response = await fetch('https://example.com'); const data = await response.json(); const csv = jsonToCsv(data); downloadCsv(csv, 'report_export.csv'); catch (error) console.error('Export failed:', error); Use code with caution. Key Technical Considerations Basic conversion often fails with nested JSON
Once you have the CSV string, you need to create a and a temporary URL to trigger a browser download. javascript const data = await response.json()