How to use Excel to CSV
- Choose or drop an .xlsx file.
- Select a worksheet (or “all sheets”).
- Choose a delimiter and whether to add a UTF-8 BOM (helps Excel on Windows).
- Download the CSV.
Supported formats
| Input | XLSX |
|---|---|
| Output | CSV, TSV, ZIP |
| Processing | On your device, in the browser (no upload) |
Limitations to know
- CSV stores values only: formulas are exported as their last calculated values, and formatting, charts and comments are dropped.
- Dates stored as Excel date numbers are written as ISO dates (YYYY-MM-DD).
- Old .xls files are not supported – save as .xlsx first.
Privacy: Excel to CSV runs entirely in your web browser. Your XLSX data is not uploaded, stored or shared, and nothing about its contents is sent to analytics.
Frequently asked questions
Should I use comma or semicolon?
Use comma for most software and English-language regions. Many European versions of Excel expect semicolons because the comma is used as the decimal separator.
What is the UTF-8 BOM option?
A BOM is an invisible marker at the start of the file. Excel on Windows needs it to show accented and non-Latin characters correctly when opening CSVs.
References
Last updated · Maintained by the ZippyToolkit team