Convert a spreadsheet to CSV locally
How to use it
This page starts on CSV conversion, Excel to CSV. The sample inventory workbook has one sheet named Inventory, with a header row and two items. The download should be one CSV, not a ZIP. Open it and check the header and both rows. A workbook with several sheets is a different export shape. Confirm you exported the sheet you meant. Values are taken from the workbook as the browser reads them. Formulas that have not been calculated in the file may not become the number you see in Excel. The file is not uploaded.
The file stays in this browser. NexTool does not upload it and does not keep a copy after you leave the page. Download the result and check it before you send it on. If the tab runs out of memory, the job stops and the original is still the one on your computer.