Excel to CSV

Save in the encoding your target system expects — online stores, mailing tools and accounting software often require CSV.

Files are processed in your browser and never uploaded

Drop an Excel file here or click to choose.xlsx · .xls · .ods

Which encoding should I choose?

Encoding	When
UTF-8 with BOM	Files you'll reopen in Excel and most modern services. The BOM (3 bytes at the start) tells Excel the file is UTF-8, so accented and non-Latin characters display correctly.
UTF-8 without BOM	Web development, data analysis (Python, R), Google Sheets imports, and tools that show a stray character in the first column name when a BOM is present.
EUC-KR	Only for older Korean software that requires it.

If the upload instructions say “UTF-8”, pick that. If you're unsure, try UTF-8 with BOM first.

Delimiter — comma is standard. Many European systems expect semicolons (because the comma is the decimal separator), and tabs (TSV) suit data with lots of commas.
Date format — Excel dates are written as text such as 2026-11-09 (ISO), so they don't turn into serial numbers like 46000.
Quotes — values with commas, quotes or line breaks are quoted automatically. Turn the option on if a system requires every value in quotes.

A CSV stores values only: formulas become their results, and formatting, colors and merged cells are dropped. Files never leave your device.

Are leading zeros kept?

Yes, inside the CSV. But Excel may drop them when you reopen the CSV — use CSV to Excel for that.

My workbook has several sheets.

A CSV holds one sheet, so each sheet becomes its own file. Click “All sheets as ZIP”.

Does it handle big files?

Hundreds of thousands of rows work on a computer; phones may slow down for lack of memory.