JSON to CSV Converter
Paste a JSON array of flat objects and convert it into clean, properly escaped CSV — ready to copy or download as a spreadsheet file.
How to Use the JSON to CSV Converter
- Paste a JSON array of objects into the input box, e.g.
[{"a":1},{"a":2}]. - Click "Convert to CSV". The tool collects every unique key across all objects to build the header row.
- Fields containing commas, quotes or line breaks are automatically wrapped in quotes so the CSV stays valid.
- Click "Copy" to copy the CSV text, or "Download data.csv" to save it as a file you can open in Excel or Google Sheets.
Why Use This Tool?
Is my JSON data uploaded to a server?
No. The conversion runs entirely inside your browser using JavaScript. Nothing you paste is transmitted anywhere, which is important since JSON exports from APIs or databases can contain customer records, emails or other sensitive fields you don't want passing through a third-party server.
What happens if my objects have different keys?
The converter scans every object in the array and builds a header row from the union of all keys found. Any object missing a particular key simply gets an empty cell in that column, so your CSV stays perfectly rectangular even with inconsistent JSON.
How are special characters handled?
Any field containing a comma, double quote, or line break is automatically wrapped in double quotes, with internal quotes escaped by doubling them (per the standard CSV convention). Nested objects or arrays inside a field are stringified so no data is silently lost.
Who needs a JSON to CSV converter?
Developers exporting API data for a spreadsheet review, analysts turning a JSON log dump into a table, and marketers importing structured data into tools like Excel or Google Sheets all benefit from a quick, reliable JSON-to-CSV conversion without writing a script.