Excel to CSV

0 uploads — runs entirely in your browser, works offline

Drag files here, or .

Convert each spreadsheet's first sheet to CSV — on your device, nothing uploaded.

Excel to CSV — convert spreadsheets to CSV

Convert an Excel file's first sheet to CSV. It runs entirely in your browser (0 uploads, works offline).

How to use it

  1. Add your .xlsx or .xls files.
  2. Convert them.
  3. Download the CSV.

FAQ

How do I convert Excel to CSV for free?

Add the spreadsheet and this page reads the first sheet and writes a CSV — on your device with no upload.

Is my spreadsheet uploaded anywhere?

No. Conversion runs entirely in your browser and nothing is transmitted or stored, which you can verify by turning off your Wi-Fi — important for financial data.

Which sheet is converted?

The first sheet of the workbook. Split multi-sheet workbooks first if you need each one.

Does it keep leading zeros?

Values are written as they appear in the sheet; format cells as text in Excel if you need to preserve leading zeros.

Limits

Converts the first sheet to CSV; formulas are exported as their computed values.

Related

The Excel-to-JSON tool outputs JSON; the CSV cleaner tidies the result.

Bookmark this page (Ctrl+D, or ⌘D on Mac) or install the app — it works offline the next time you need it.