Question 1

What can this tool convert between?

Accepted Answer

It converts .xlsx or .xls spreadsheet files to .csv, and it can also go the other direction, turning a .csv file into a proper .xlsx workbook, with an inline grid preview so you can check the data before downloading.

Question 2

Is my spreadsheet uploaded anywhere?

Accepted Answer

No, the file is read and converted entirely in your browser, so your data never leaves your computer or touches a server.

Question 3

What happens to multiple sheet tabs or cell formatting when converting to CSV?

Accepted Answer

CSV is a plain-text, single-table format, so converting to .csv only keeps the data from one sheet and strips out formatting, formulas, colors, and multiple tabs, since CSV has no way to represent those.

Question 4

Is it free to use?

Accepted Answer

Yes, it's free with no account needed, just upload a file and convert it.

Question 5

Can I preview or edit the data before downloading the converted file?

Accepted Answer

Yes, the tool shows an inline grid preview of the converted data so you can visually check rows and columns line up correctly before you save the output file.

Excel ↔ CSV Converter

Frequently asked questions about Excel ↔ CSV Converter