Convert CSV to XLS

CSV to XLS converterFREE

Drop a .CSV file here

or pick one - we convert it to .XLS and give you the file to download

How to convert CSV to XLS

XLS supports a maximum of 65,536 rows and 256 columns; rows beyond that limit are silently discarded - use XLSX if your data is larger.
CSV has no formulas, colors, or multiple sheets; the resulting XLS file will contain raw values only.
Leading zeros in phone numbers, ZIP codes, or product codes will be dropped unless those columns are marked as Text in the import wizard.

Can I convert CSV to XLS without Microsoft Office?

Yes - LibreOffice Calc is free and open-source and handles the full conversion on Windows, macOS, and Linux.

My CSV has more than 65,536 rows - will they all convert?

No; XLS caps at 65,536 rows and any rows beyond that are silently cut off, so save as XLSX instead, which supports over one million rows.

Why do some characters look garbled after conversion?

The CSV was likely saved in a non-UTF-8 encoding; set the correct character set (UTF-8 or Windows-1252) in the import dialog before saving as XLS.

Should I save as XLS or XLSX?

Use XLS only when the target system specifically requires it; otherwise XLSX is smaller, supports more data, and is the current Excel standard.

Learn about the formats: .CSV · .XLS