XLSX to CSV
Convert Excel files to CSV right in your browser. Each sheet — separate file in ZIP.
- One file at a time
- File size — up to 20 MB
- All sheets are converted at once, each into a separate CSV
Done! List of CSV files:
About XLSX to CSV converter
Excel (XLSX) is a convenient format for working with tables, but for uploading to a database, processing by scripts or opening in other programs you need CSV. Our converter transforms XLSX to CSV right in your browser — without uploading the file to server.
If the Excel file has multiple sheets, each sheet is converted into a separate CSV. All files are packed into a ZIP archive — you download everything with one click.
What the converter can do
- All sheets: each Excel sheet becomes a separate CSV file.
- ZIP archive: all files are downloaded in one archive.
- Delimiters: comma, semicolon or tab.
- Cyrillic: BOM marker is added for correct opening in Excel.
- Privacy: files are not uploaded to server.
How to use
- Drop XLSX file into the upload zone or click to select.
- Choose CSV delimiter (comma by default).
- Click "Convert to CSV".
- Download the ZIP archive with all sheets.
Frequently asked questions
Where do my files go? Nowhere. The file is processed in your browser's memory and disappears when you close the page.
What if Excel has multiple sheets? Each sheet becomes a separate CSV file inside the ZIP archive.
Does it work with .xls (old format)? Yes, both formats are supported.
What about formulas? The converter saves values, not formulas. If a cell contains a formula, you get the calculation result.