CSV to Excel converter
Open a CSV file as a proper .xlsx spreadsheet.
Your files never leave your device.
Quick answer
To convert CSV to Excel, drop your CSV in and press Convert. You get an .xlsx file with each column in its own cell, made in your browser.
Drop files here
or paste from your clipboard
How to convert CSV to Excel
- Drop your CSV file onto the box.
- Press Convert.
- Download the .xlsx file and open it in Excel, Google Sheets or LibreOffice.
CSV is plain text with commas between values. XLSX is the Excel format, with proper columns, number types and room for several sheets.
Common questions
Why does opening a CSV in Excel go wrong?
Excel guesses how to read plain text. It may merge columns, drop leading zeros or turn long numbers into 1.23E+11. Converting to XLSX first gives each value its own cell.
Do leading zeros survive?
Yes. Values like 01234 stay as text, so postcodes, phone numbers and IDs are not damaged. Plain numbers such as 42 become real numbers you can add up.
What separators work?
Commas, semicolons, tabs and pipes. The tool looks at the first line and picks the one that fits, and understands quoted values with commas inside.
Do accents and other languages work?
Yes, if the CSV is saved as UTF-8. If letters look wrong, fix the file first with the TXT encoding fixer.
Is my spreadsheet uploaded anywhere?
No. The conversion happens inside your browser tab, so your spreadsheet never leaves your device. We cannot see it or keep a copy.
Can I convert many files at once?
Yes. Drop several files in and they are converted one after another. When they finish you can download each one, or all of them together as one ZIP.