Convert Excel files to CSV instantly.
Open an XLSX or XLS file, optionally edit or clean the data, then export as a clean CSV — all in your browser.
How it works
Three simple steps
Open your Excel file
Drag and drop an XLSX or XLS file to load it into the editor.
Review and edit
Check the imported data, fix any issues, and clean up columns if needed.
Download as CSV
Export a clean CSV file ready for import into any system.
Key features
Everything you need
XLSX and XLS support
Open both modern XLSX and legacy XLS Excel files for conversion.
Edit before exporting
Clean up data, remove unwanted columns, or fix values before saving as CSV.
Clean CSV output
The exported CSV uses standard comma separation with proper quoting.
No server processing
Conversion runs locally in your browser — your files stay on your device.
Your data stays on your device
SheetTool processes everything locally in your browser. Your files are never uploaded to a server. No account required.
FAQ
Frequently asked questions
How do I convert an Excel file to CSV?
Open your XLSX or XLS file in SheetTool, then click export and select CSV format. The file downloads immediately.
Can I convert XLS (legacy Excel) files?
Yes. SheetTool supports both XLSX and XLS formats for import and conversion.
Is the Excel to CSV converter free?
Yes. SheetTool is completely free with no sign-up, no file size limits, and no watermarks.
Can I select which sheet to convert?
SheetTool imports the first sheet from multi-sheet workbooks. You can edit the data before exporting as CSV.
Ready to get started?
Open SheetTool and start working with your files right away. No sign-up needed.