Excel to CSV Converter
Convert Excel spreadsheets (.xlsx, .xls) to CSV format in your browser. Select sheets, preview data, and download the CSV file instantly.
About Excel to CSV Converter
This Excel to CSV converter transforms spreadsheet files into comma-separated values format. Upload an .xlsx or .xls file, choose a sheet if there are multiple, preview the data, and download as a clean CSV file.
How It Works
The tool reads your Excel file using the SheetJS library, which runs entirely in your browser. It detects all sheets in the workbook, lets you pick which one to convert, and generates a standard CSV output with proper quoting for fields that contain commas.
Multi-Sheet Support
If your Excel file contains multiple sheets, a dropdown appears letting you switch between them. The table preview updates immediately so you can verify the right data before downloading.
Related Tools
Need to go the other direction? The CSV to Excel converter turns CSV data into proper .xlsx files. For viewing and editing CSV data, try the CSV Viewer with sorting, filtering, and inline editing.
All processing runs client-side. Your spreadsheet data stays on your device and is never uploaded.
Frequently Asked Questions
Which Excel formats are supported?
The tool supports .xlsx, .xls, .xlsm, and .xlsb files. These cover all common Excel formats from both modern and older versions.
What if my Excel file has multiple sheets?
The tool detects all sheets and shows a dropdown selector. Choose the sheet you want to convert, preview the data, and download it as CSV. Each sheet is converted separately.
Does it preserve formulas?
The CSV output contains the calculated values, not the formulas themselves. CSV is a plain text format and cannot store formulas.
Are my files uploaded to a server?
No. The conversion happens entirely in your browser using the SheetJS library. Your data never leaves your device.
Can I convert multiple sheets at once?
Currently you convert one sheet at a time. Select the sheet you want from the dropdown, download it, then select the next sheet.