CSV to XLS
Convert CSV files to XLS in seconds, for free. Nothing to install.
Files are deleted from the server automatically after 1 h.
Why convert CSV to XLS?
- XLS opens in old Microsoft Office 97–2003 versions that do not support newer formats.
- Convert in a few seconds right in your browser, without installing software.
You don't need to install any software to convert CSV to XLS. Upload your file, choose XLS and download the result a few seconds later. The conversion runs on our servers and your file is deleted automatically after 1 h.
CSV vs XLS: comparison
| Feature | CSVComma-Separated Values | XLSMicrosoft Excel 97–2003 Workbook |
|---|---|---|
| Developer | — | Microsoft |
| Released | — | 1997 |
| Type | spreadsheet | spreadsheet |
| Editable content | ✓ yes | ✓ yes |
| Opens with | Microsoft Excel, Google Sheets, Notepad | Microsoft Excel, LibreOffice Calc, Google Sheets |
Tip: CSV files are saved as UTF-8, so non-Latin characters display correctly.
How it works
- Choose or drop your CSV file.
- Pick XLS as the output format.
- Click “Convert” and download your file.
CSV to XLS: questions and answers
Will quality be lost when converting CSV to XLS?
Text, tables and images are kept. Very complex layouts or rare fonts may shift slightly.
How long does CSV to XLS conversion take?
Usually 1–10 seconds. Several files are processed in parallel.
What is the maximum CSV file size?
Up to 50 MB per file and up to 20 files at once — for free.
Can I convert CSV to XLS on my phone?
Yes. TezConvert works in any browser on Android and iPhone — no app needed.
How do I open a XLS file?
XLS files open in: Microsoft Excel, LibreOffice Calc, Google Sheets.
Are my files safe?
Files are used only for the conversion, never shown to anyone, and deleted automatically after 1 h. The original is deleted right after conversion.
⇄ Need the opposite? Convert XLS to CSV →