XLSX to CSV Converter
Turn any Excel workbook into clean CSV with this free XLSX to CSV converter. Pick a sheet, edit cells if you need to, then download the file. Nothing is uploaded.
How to convert XLSX to CSV
Choose your Excel file
Drag an .xlsx or .xls onto the page or click Choose Excel file. It is read in your browser, so nothing is uploaded to a server.
Pick the sheet
If the workbook has more than one sheet, choose the one you want from the Sheet menu. Each sheet becomes its own CSV, so switch and export them one at a time.
Edit the data if you need to
Click any cell to change its text. Right-click a column letter or row number to insert, move, or delete. Skip this step if the data is already clean.
Download the .csv
Click Download .csv to save the current sheet as a plain-text CSV file. It opens in Excel, Google Sheets, databases, and any script that reads CSV.
Why convert XLSX to CSV?
An XLSX is an Excel workbook. It holds one or more sheets, plus formatting, formulas, and data types. That is useful inside Excel, but a lot of other software cannot read it. Databases, analytics scripts, e-commerce imports, and older systems usually want CSV, which is plain text with one row per line and values separated by commas.
CSV strips all the extra layers and leaves just the data. That makes it small, portable, and readable by almost anything, from Python and SQL to a product feed or an email tool. The catch is that a CSV holds a single table, so a workbook with several sheets becomes one CSV per sheet.
This XLSX to CSV converter runs entirely in your browser. Your file is read on your own device and never uploaded, which matters when the spreadsheet has customer records or internal numbers. It reads every sheet in the workbook, lets you fix any cell in an editable grid, and exports clean CSV with commas and quotes handled correctly.
What this XLSX to CSV converter gives you
100% in your browser
Your workbook is read and converted on your own device. Nothing is uploaded, so private data stays private.
Reads every sheet
Multi-sheet workbooks open in full. Switch between sheets and export each one as its own CSV.
Editable grid before export
Fix a typo, rename a header, or add and remove rows and columns before you download, with no second tool needed.
Safe CSV quoting
Commas, quotation marks, and line breaks inside a value are escaped correctly, so a name like "Doe, John" stays in one column.
Works with .xlsx and .xls
Both the modern Excel format and older .xls workbooks are supported out of the box.
Free with no signup
No account, no watermark, and no row limit. Convert as many files as you want.
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XLSX to CSV Converter FAQ
How do I convert XLSX to CSV?
Open the XLSX to CSV converter, choose your .xlsx or .xls file, and it appears in an editable grid within a second. Pick the sheet you want, fix any cells if needed, then click Download .csv. The whole thing happens in your browser, with no upload and no signup.
Is converting Excel to CSV free?
Yes. This converter is free with no account, no watermark, and no limit on how many files you convert. Because the work happens in your browser instead of on a paid server, there is no daily cap to hit.
What is the difference between XLSX and CSV?
XLSX is the Excel workbook format, which stores multiple sheets, formatting, data types, and formulas. CSV is plain text with one table, where values are separated by commas. Convert XLSX to CSV when another app or script needs simple, universal data instead of a full workbook.
Can I convert Excel to CSV without Excel installed?
Yes. You do not need Excel or any install. This tool runs in any modern web browser on Windows, Mac, Linux, or a phone. Pick your Excel file, and it builds the CSV locally, then hands you the file to save.
Does CSV keep multiple sheets?
No. A CSV file holds one table, so it cannot store several sheets at once. When your workbook has more than one sheet, export each sheet separately. Switch sheets in the menu, and each download gives you a CSV named after that sheet.
Will converting to CSV lose my formatting?
CSV holds data only, so colors, fonts, column widths, and formulas are not carried over. The values themselves stay exactly as they are, including text and numbers. If you need formatting kept, keep the .xlsx and use CSV only where plain data is required.