Convert Excel to CSV
Turn your Microsoft Excel spreadsheet into a CSV data file — free, fast and without installing any software. Your file is transferred over an encrypted connection, converted on our servers and deleted automatically right after processing. You can convert multiple files at once and download everything as a ZIP.
Files are transferred over an encrypted connection, converted and automatically deleted right after processing.
How to convert
- 1
Upload your Excel file — drag & drop it into the box or click “Choose files”. You can convert several files at once.
- 2
Click “Convert now”. The conversion starts immediately and usually takes just a few seconds.
- 3
Download your finished CSV file — individually or all files together as a ZIP archive.
About the Excel format
XLSX is the spreadsheet format of Microsoft Excel, used for tables, calculations and data analysis. Google Sheets and LibreOffice Calc open it as well.
Why convert to CSV?
CSV files store table data as plain text separated by commas or semicolons. Every export tool produces them — but they carry no formatting, formulas or multiple sheets. Converting CSV turns raw data into a proper, formatted document you can actually work with.
Frequently asked questions
Is the Excel to CSV converter really free?
Yes. Converting Excel to CSV on ConvertInSeconds is completely free — no sign-up, no watermarks and no hidden costs. The service is financed through advertising.
Is it safe to convert my files here?
Yes. Files are transferred over an encrypted HTTPS connection, converted and then automatically deleted. We do not keep copies of your documents and we never look at their content.
Can I convert several files at once?
Yes. Simply drop multiple Excel files into the upload box — they are converted in one go, and you can download the results individually or bundled as a ZIP archive.
Will the quality suffer when converting Excel to CSV?
No. The conversion preserves your content as faithfully as possible.
Related converters
Excel to PDF
Convert Microsoft Excel spreadsheet to PDF document online, free and private. Fast, secure and auto-deleted
CSV to PDF
Convert CSV data file to PDF document online, free and private. Fast, secure and auto-deleted
CSV to Excel
Convert CSV data file to Microsoft Excel spreadsheet online, free and private. Fast, secure and auto-deleted