.WK4 File Extension

There is only one file type that uses the .WK4 extension:

Lotus 4 Worksheet

Lotus 4 Worksheet

Spreadsheet created by IBM Lotus 1-2-3 (v.4), a spreadsheet program included with Lotus SmartSuite; stores data in cells that are organized into rows and columns; each cell can store static data or a formula, which automatically updates the value displayed in the cell.

NOTE: Previous versions of Microsoft Excel could import WK4 files, but Excel 2007 and later does not support the WK4 format.

Software's name License Platforms
Corel Quattro Pro Corel Quattro Pro Commercial Windows
Gnumeric Gnumeric Open Source AndroidLinuxMacWindows
IBM Lotus 1-2-3 IBM Lotus 1-2-3 MacWindows
Lotus 1-2-3 WK4 File Converter Lotus 1-2-3 WK4 File Converter MacWindows

Updated: April 27, 2011

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