Convert JSON to CSV Online Free

Got JSON data you want in a spreadsheet? AllConvert converts JSON to CSV instantly, right in your browser — ready to open in Excel or Google Sheets. No upload, no account.

Why convert JSON to CSV?

JSON is how APIs and apps exchange data, but it is painful to read in bulk and impossible to filter, sort or chart without writing code. CSV opens directly in Excel, Google Sheets and Numbers, turning an API export into something anyone on the team can analyze. It is the fastest path from a developer-shaped file to a business-shaped spreadsheet.

What JSON shape works?

The converter expects an array of flat objects — the most common shape for API responses and database exports. Each object becomes a row, and the union of keys becomes the header row. Deeply nested structures should be flattened before converting; if a value is itself an object or array, it is serialized into its cell as text.

From CSV back to JSON or Excel

AllConvert covers the reverse trip too: CSV to JSON for getting spreadsheet data back into code, and CSV to XLSX when you want a real Excel workbook rather than plain text.

How to convert

1. Open AllConvert and drop your JSON file onto the page.
2. Select CSV from the format dropdown on the file card.
3. Click Convert and download your result.

The entire process runs locally in your browser. Nothing is uploaded, and it works on desktop and mobile, in Chrome, Firefox, Safari, and Edge.