Convert CSV to Excel
Turn your CSV data file into a Microsoft Excel spreadsheet — 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 CSV 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 Excel file — individually or all files together as a ZIP archive.
About the CSV format
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.
Why convert to Excel?
XLSX is the spreadsheet format of Microsoft Excel, used for tables, calculations and data analysis. Google Sheets and LibreOffice Calc open it as well. Convert to Excel when you need to work with the numbers: sort, filter, calculate and build charts.
Frequently asked questions
Is the CSV to Excel converter really free?
Yes. Converting CSV to Excel 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 CSV 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 CSV to Excel?
No. The conversion preserves your content as faithfully as possible.
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