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Convert XLSX to XLS

Some programs and portals still want the old .xls format. Convert your XLSX (or ODS, CSV) to XLS in one click.

FreeNo sign-upFiles deleted after 30 min
Choose files
or drop them here · .xlsx .ods .csv

Options

How to convert XLSX to XLS

  1. Drop the .xlsx files (ODS and CSV work too).
  2. Keep “Excel 97-2003 (.xls)” selected.
  3. Click Convert and download the .xls files.

Accounting packages, bank portals, old import tools and some government forms still accept only the .xls format of Excel 97 to 2003. Excel itself can save in that format, but not when you only have the file on a phone, or when you have a batch of them. This tool converts XLSX, ODS and CSV files to XLS with LibreOffice.

The XLS format has limits that XLSX does not: 65,536 rows and 256 columns per sheet, and no support for some newer functions and formatting. Sheets that exceed those limits are cut, and newer functions are replaced by their value. For everything else (values, formulas, formatting, multiple sheets), the conversion is faithful.

The reverse conversion, XLS to XLSX, is available on its own page, and the same converter also produces ODS, CSV and PDF when the receiving program wants those instead. Up to 50 files of 300 MB per run; everything is deleted after 30 minutes.

Frequently asked questions

Why would I need .xls today?

Some older programs, import tools and portals only accept the Excel 97-2003 format.

What is lost in XLS?

Sheets are limited to 65,536 rows and 256 columns, and some newer Excel functions are kept as values only.

Can I convert several files at once?

Yes, up to 50 files in one run.

Can I go back to XLSX afterwards?

Yes, use the XLS to XLSX page.

Is it free?

Yes, free and without an account.