WK1 to XLSX Converter

Batch convert wk1 files to xlsx format online for free

Choose files or drag & drop them here.
Only you have access to your files.
All files will be deleted after one hour.

How to convert WK1 files to XLSX online?

Step-by-step guide to convert wk1 to xlsx using AnyConv. It works on PC (Windows, Mac, Linux) and mobile devices (iPhone, Android).

Upload WK1-file

Drag and drop your WK1 file into the upload area. The maximum file size is 100 MB.


Click "Convert" to change wk1 to xlsx. The conversion usually takes a few seconds.

Download your XLSX

Now you can download the XLSX file. The download link only works on your device.


  • ❓ How can I convert files from WK1 to XLSX?
    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 XLSX conversion is completed, you can download your XLSX file.
  • ⏱️ How long does it take to convert WK1 to XLSX?
    Document conversion is pretty fast. You can change WK1 to XLSX in a few seconds.
  • 🛡️ Is it safe to convert WK1 to XLSX 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 XLSX) is absolutely safe.
  • 💻 Can I convert WK1 to XLSX on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our WK1 to XLSX converter works online and does not require software installation.

Information about WK1 and XLSX file formats

🔸 File format WK1 XLSX
🔸 Full name Lotus 1-2-3 spreadsheet XLSX - Office Open XML Document
🔸 File extension .wk1 .xlsx, .xlsm
🔸 MIME type application/vnd.lotus-1-2-3, application/x-123, application/lotus, application/x-lotus123, zz-application/zz-winassoc-123 application/vnd.-openxmlformats-officedocument.-spreadsheetml.-sheet
🔸 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. The Office Open XML file formats are file formats that can be used to represent electronic office documents. There are formats for word processing documents, spreadsheets, presentations, and specific formats for material such as mathematical formulae, graphics, bibliographies, etc.
🔸 Technical details Office Open XML documents are stored in Open Packaging Convention (OPC) packages, which are ZIP files containing XML and other data files, along with a specification of the relationships between them. Depending on the type of document, the packages have different internal directory structures and names.
🔸 File conversion WK1 conversion XLSX 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/Office_Open_XML_file_formats