Excel to CSV
Drop your .xlsx workbook below to get a CSV. The conversion happens inside this browser tab, so the file is never uploaded to a server.
How to convert Excel to CSV
- Choose your .xlsx file, or drag it onto the box below.
- The first worksheet is converted; the tool names any others it found.
- Download the CSV.
What a CSV cannot carry
Converting to CSV is lossy by definition: formulas become values, and formatting, styles, charts, multiple sheets and column widths are all dropped. That is the trade for a format every other system can read. Keep the .xlsx if you may need the structure back.
Separator behaviour is fixed, not regional
Excel writes CSVs using your operating system list separator, which is why a file exported in one locale can arrive as a single column in another. Output here always uses commas with RFC 4180 quoting, so the result is the same everywhere.
Questions
Which worksheet does it convert?
The first one. If the workbook has more, the tool lists their names after converting so you know what was left behind — a CSV can only hold one sheet, so multiple sheets need multiple conversions.
Do I get the formula or the result?
The result. A CSV has no concept of a formula, so the calculated value stored in the cell is written out. This is the same thing Excel does when you Save As CSV.
Is my file uploaded anywhere?
No. The workbook is parsed in JavaScript inside your own browser tab. Nothing is sent to a server, stored or logged.
Why convert here rather than using Save As in Excel?
Mostly convenience if Excel is not in front of you, and predictability: Save As uses your system list separator, so the same workbook produces comma-separated output on one machine and semicolon-separated on another. This always writes commas.
What happens to formatting, colours and merged cells?
They are discarded, because CSV cannot express them. Only the cell values survive. If you need formatting preserved, CSV is the wrong destination format.
Background
For why CSV files lose leading zeros, arrive as one long column, or show strange characters, see what a CSV file is. This page is one of the free CSV converter tools — all of them run in your browser and none of them upload your file.