Convert Excel worksheets to CSV online

Export one visible worksheet from an XLSX or XLS workbook to a downloadable CSV file. Choose the delimiter, optionally include a UTF-8 BOM for Excel compatibility, and keep blank rows when you need them.

Your Excel workbook is processed locally in your browser and is not uploaded to our servers.

How to convert Excel to CSV

1. Choose or drag an XLSX or XLS file into the tool.
2. Review visible worksheets and select exactly one sheet to export.
3. Set delimiter, UTF-8 BOM, and blank-row options, then preview the first rows.
4. Select Convert to CSV to create and download the file.

Browser-based Excel export

• Supported formats: XLSX and XLS.
• Export one visible worksheet per download.
• Delimiters: comma, semicolon, tab, or pipe.
• Optional UTF-8 BOM for better Excel import of Unicode.
• Formula cells export cached values when available—not formula text.

Private Excel-to-CSV processing

Your Excel workbook is processed locally in your browser and is not uploaded to our servers. Parsing and CSV generation use SheetJS in the browser. There is no Looty Tools conversion endpoint that receives your workbook contents for this workflow.

Limits and important notes

• Maximum file size is 25.0 MB.
• Maximum of 50 worksheets per workbook.
• CSV cannot contain multiple worksheets.
• Hidden worksheets are excluded from selection.
• Formulas are not recalculated; cached values may be stale if the workbook was not recalculated before saving.
• Excel formatting, colors, charts, images, macros, and formula expressions are not preserved.
• Merged-cell values appear in the top-left cell; other cells in the merge may be blank.
• Large workbooks may use significant browser memory.

Related tools

• Excel to PDFConvert Excel spreadsheets to PDF files.
• CSV to ExcelConvert CSV files to Excel spreadsheets.
• Split ExcelSplit an Excel workbook into separate files.
• CSV to JSONConvert CSV data to JSON format.

Excel to CSV FAQ

How do I convert Excel to CSV?

Open Excel to CSV, choose an XLSX or XLS workbook, select one visible worksheet, set delimiter and BOM options, then download the CSV file.

Is my Excel workbook uploaded?

No. Your Excel workbook is processed locally in your browser and is not uploaded to our servers.

Can CSV contain multiple worksheets?

No. A CSV file is a single table. Export one worksheet at a time.

Which worksheet is exported?

Only the worksheet you select. Hidden worksheets are excluded from the list. The first visible worksheet is selected by default.

Are Excel formulas preserved?

No. The CSV includes cached calculated values when available, not formula expressions. Formulas are not recalculated.

Why can formula results be outdated?

If the workbook was saved without recalculating formulas, SheetJS exports the stored cached values, which may be stale.

Are charts and formatting preserved?

No. CSV does not keep Excel colors, themes, charts, images, macros, or layout formatting.

Does the converter support .xls and .xlsx?

Yes. Supported formats: XLSX and XLS. CSV input is not accepted.

What does the UTF-8 BOM option do?

When enabled, the download starts with a UTF-8 byte-order mark so Excel often opens international characters more reliably. Disable it for plain UTF-8 CSV without a BOM.

What is the maximum file size?

Each Excel file must be 25 MB or smaller.