Excel ↔ CSV Converter – Free Online Tool
Convert Excel .xlsx/.xls files to CSV and CSV files to Excel in your browser. Multi-sheet workbooks export as a ZIP of CSVs. No Microsoft Office or server upload needed.
Click, or drop your files here
Multiple content formats supported
Guide
How to Use
Choose Direction
Select Excel → CSV or CSV → Excel using the mode toggle.
Upload Your File
Drop an .xlsx, .xls, or .csv file onto the upload area.
Download Result
Click Convert then download your converted file instantly.
Benefits
Why Use Our Tool?
Multi-Sheet Support
All sheets from Excel workbooks are exported — one CSV per sheet, bundled as ZIP.
100% Private
Conversion happens in your browser — no file is ever uploaded to a server.
No Office Required
Works without Microsoft Excel, LibreOffice, or any desktop software.
No Registration
Free to use immediately with no account or sign-up required.
FAQ
Frequently Asked Questions
What happens with multi-sheet Excel files?
Each sheet is exported as a separate CSV file. When your workbook has more than one sheet, all CSVs are bundled into a single ZIP archive for download.
Does CSV to Excel preserve my data types?
The converter creates a standard .xlsx file with all values as text. You can use Excel's Format Cells after opening to apply number or date formatting.
Is my file uploaded to a server?
No. All conversion runs entirely in your browser using SheetJS (xlsx). Your spreadsheet never leaves your device.
What is the maximum file size?
Files up to 20MB are supported. For very large spreadsheets, consider splitting them before converting.