WK1 to XLS Converter

Batch convert wk1 files to xls online. Change wk1 to xls on Windows, Mac, iPhone and Android in 2 clicks.

Select files for conversion or drag and drop them to the upload area.
Your files are securely protected and available only to you.
All files are automatically deleted from our servers after 1 hour.

How to convert WK1 files to XLS online?

Step-by-step instructions for converting wk1 files to xls

Upload WK1-file

Click "Choose File" button to select a wk1 file on your computer. WK1 file size can be up to 100 Mb.

Convert WK1 to XLS

Click "Convert" button to start conversion.

Download your XLS

When the conversion process is complete, you can download the XLS file.


  • ❓ How can I convert WK1 to XLS?
    First you need to add file for conversion: drag and drop your WK1 file or click the "Choose File" button. Then click the "Convert" button. When WK1 to XLS conversion is completed, you can download your XLS file.
  • ⏱️ How long does it take to convert WK1 to XLS?
    Document conversion is pretty fast. You can change WK1 to XLS in a few seconds.
  • 🛡️ Is it safe to convert WK1 to XLS on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 1 hour. No one has access to your files. File conversion (including WK1 to XLS) is absolutely safe.
  • 💻 Can I convert WK1 to XLS on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our WK1 to XLS converter works online and does not require software installation.

Information about WK1 and XLS file formats

Name WK1 XLS
Full name Lotus 1-2-3 spreadsheet XLS - Microsoft Excel Binary File Format
File extension .wk1 .xls
MIME type application/vnd.ms-excel
Developed by IBM Microsoft
Type of format Spreadsheet
Description WK1 file extension is associated with Lotus 1-2-3 version 2.x and used for spreadsheet documents. The WK1 files were used as the default spreadsheet format of Lotus 1-2-3 version 2, including rows and columns, formulas, etc. Lotus 1-2-3 is a discontinued product. Microsoft Excel, up until 2007 version used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML-based format called "XML Spreadsheet".
Technical details OpenOffice.org has created documentation of the Excel format. Since then, Microsoft has made the Excel binary format specification available to download freely.
File conversion WK1 conversion XLS conversion
Associated programs Lotus 1-2-3 Microsoft Office, LibreOffice, Kingsoft Office, Google Docs.
Wiki https://en.wikipedia.org/wiki/Lotus_1-2-3 https://en.wikipedia.org/wiki/Microsoft_Excel#File_formats