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Convert, clean, and reformat CSV and JSON data right in your browser. Because it all runs locally, even sensitive datasets never leave your device.
- CSV → JSONConvert a CSV file (first row = headers) to a JSON array.
- JSON → CSVConvert a JSON array of flat objects into CSV.
- Merge CSV filesCombine multiple CSV files (with matching headers) into one.
- Remove duplicate CSV rowsDrop exact duplicate rows from a CSV file, keeping the header.
- Extract CSV columnsPick a comma-separated list of column names to keep from a CSV.
- Excel → CSVConvert a sheet from an Excel workbook (.xlsx/.xls) to CSV.
- CSV → ExcelConvert CSV text into a downloadable Excel workbook (.xlsx).