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Excel to CSV Converter

Open an Excel file in your browser, view each sheet as a table, and download any sheet as CSV without uploading the file.

About Excel to CSV Converter

An Excel viewer opens spreadsheet files without Microsoft Excel. This page reads .xlsx, .xls, .ods, and .csv files in your browser with the SheetJS library, lets you switch between sheets, and shows the cells as a table. Any sheet can be downloaded as a UTF-8 CSV file. The file is processed on your device and is not uploaded. Only the first 500 rows are displayed, although the CSV contains every row, and charts, colors, and formulas are not shown.

Also known as: XLSX to CSV Converter, Excel Viewer, XLSX Viewer.

Questions about Excel to CSV Converter

Is my spreadsheet uploaded to a server?

No. The file is read from your disk by code running in the browser tab and stays on your device. The only network request is the one that loads the spreadsheet library the first time you open a file.

What happens to formulas when I convert to CSV?

CSV is a plain text format that holds values only. Each cell is exported as the value stored in the workbook, as formatted text, and the formula behind it is not kept. Each sheet is downloaded as its own CSV file.

Why do I only see 500 rows?

The on-screen table is limited to the first 500 rows so that large files stay responsive. The row and column counts above the table describe the whole sheet, and the CSV download contains every row.

Runs in your browser. Page last updated .

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