Spreadsheet converter
Convert XLSX to CSV Online
Convert XLSX to CSV online without installing software or sending your workbook to a server. SheetSweep reads Excel spreadsheets in your browser and gives you a downloadable CSV in a few steps.
You can also convert CSV to Excel, CSV to JSON, JSON to CSV, TSV to XLSX, and supported spreadsheet files to PDF. Add one file or a batch, choose a single output format, and select the worksheet when an Excel file has more than one.
The converter supports CSV, TSV, XLSX, XLS, and JSON input, with CSV, TSV, XLSX, JSON, and PDF output. Your source files remain unchanged.
Open the ConverterPrivate by design. Your files never leave this browser tab — no uploads, no servers, no signup. What happens in your spreadsheet stays in your spreadsheet.
1Add one file or a batchChoose CSV, TSV, XLSX, XLS, or JSON files from your device.
2Pick the output formatConvert every file to CSV, TSV, XLSX, JSON, or PDF.
3Download the resultChoose a worksheet when needed, then save each converted file.