WK4 Converter
Convert WK4 spreadsheet documents to a variety of formats, edit and optimize documents online and free.
Drop Files Anywhere to Upload
The WK4 file extension, short for Lotus 4 Worksheet, was developed by IBM for its Lotus 1-2-3 spreadsheet software. These files store data in cells organized into rows and columns, similar to modern spreadsheets. Primarily used for data entry and accounting, WK4 files have become less common with the discontinuation of Lotus 1-2-3. While older versions of Microsoft Excel could import WK4 files, this support was dropped in Excel 2007 and later. Today, specialized converters or older spreadsheet programs like Gnumeric can still open WK4 files.
Click Choose File to browse and select the WK4 spreadsheet document you want to process.
Select the output format you want to apply to your WK4 spreadsheet document.
After the conversion completes successfully, click Download to retrieve the file.
Vertopal CLI must be installed to handle WK4 spreadsheet document conversions correctly.