Excel to CSV
100% private — runs on your device, never uploaded. Works offline once loaded.
Get the data out of a workbook as plain CSV that any database, script or import form accepts. Every sheet is listed with its row and column count; preview one, download a single sheet, or download all of them together as a ZIP. Values are written as values, so dates come out as ISO dates (2026-03-01) that sort and import cleanly, and numbers lose the display formatting that makes a spreadsheet readable but an import fail. The workbook is read inside your browser and never uploaded.
Frequently asked questions
Is my workbook uploaded?
No. It is read and converted inside your browser tab and never leaves your device.
Does it convert every sheet?
Yes. Each sheet is listed separately, with a download for each and one ZIP containing them all.
What about formulas and formatting?
CSV holds values only, so each cell’s calculated value is written, not its formula, and colours, merged cells and number formats are dropped.
Does it support old .xls files?
No — only .xlsx, the format Excel has used since 2007. Open an .xls file in Excel, LibreOffice or Google Sheets and save it as .xlsx first.
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