When you need a CSV
Many systems only import CSV: email marketing tools that take a contact list, online stores that import a product catalog, accounting and payroll software, banking portals for bulk payments, CRMs, school platforms that upload grades, and databases. You keep the data in Excel because it's easier to edit, and at the end you need a plain CSV file.
This converter does that without opening Excel. It reads every sheet of the workbook and uses the values stored in the cells, so formulas come out as their results, which is what an import expects.
Before converting, it helps to tidy the sheet the way the receiving system expects: one header row with the column names it asks for, no blank rows in the middle, and no totals or notes under the table. The preview of the first rows lets you confirm the headers and the first records look right before you download, and if something is off, you can fix it in the spreadsheet and convert again in seconds.
Comma, semicolon or tab
"Comma-separated" doesn't always mean commas. In countries that use a comma as the decimal mark, such as much of Europe and Latin America, many programs expect a semicolon instead. Some systems prefer a tab. Choose the separator the receiving system asks for; if you aren't sure, check its import instructions or try a few rows first.
If the CSV will be opened in Excel later, turn on the Excel-compatible option, which keeps accented letters and characters such as é, ñ or ü readable instead of turning them into odd symbols.
Leading zeros and long numbers
A classic problem with CSV files is losing the zeros at the start of zip codes, product codes or employee IDs, and long numbers turning into scientific notation. The converter keeps those values exactly as they are, so a ZIP code like 02134 stays 02134 in the file.
One limit to know: only the modern .xlsx format is read. If your file is an old .xls, open it in a spreadsheet program and save it as .xlsx first. Formatting such as colors, fonts and merged cells doesn't exist in CSV, so it is not carried over; only the data is.
Private and free
Spreadsheets often contain customer lists, salaries or account numbers. The conversion happens in your browser, so the file is not uploaded and nothing is stored. It is free, with no account and no limit on files. To go the other way, the CSV to Excel converter turns CSV, JSON and XML into .xlsx, and Online spreadsheet lets you edit the file before converting.