Convert CSV to XLSX
Turn Comma-separated values files (.csv) into Excel workbook (.xlsx) in seconds. Drop one file or a whole batch: the conversion happens right in your browser, with no sign-up, no watermark and no upload.
XLSX to CSV insteadHow to convert CSV to XLSX
- 1Drop your CSV files into the box above, or click to choose them.
- 2XLSX is already selected. Adjust the options if you like.
- 3Click Convert and download your XLSX files.
Good to know
- The result is a real Excel workbook with a header row, openable in Excel, Numbers and Google Sheets.
- Column types such as numbers and true/false values are detected, and you can set the delimiter and header row.
Frequently asked questions
Is converting CSV to XLSX free?
Yes. There is no sign-up, no watermark and no limit on the number of files.
Are my files uploaded?
No. Everything runs in your browser, so your files are never uploaded to a server. That also makes it fast, because nothing has to travel over the network.
Will I lose quality converting CSV to XLSX?
No noticeable loss: the conversion keeps the content of your CSV file intact.
Can I convert several files at once?
Yes. Drop as many CSV files as you like. They are converted one after another and you can download them individually or as a ZIP.
Is there a file size limit?
There is no fixed limit. Very large files depend on your device's memory, since the conversion runs locally.
What is CSV?
CSV is a simple text format for tables that every spreadsheet and database can import.
What is XLSX?
XLSX is the Microsoft Excel spreadsheet format, holding one or more sheets of tabular data.