.WK4 File

The wk4 file extension is associated with Lotus 1-2-3 version 4.x and used for spreadsheet documents. Lotus 1-2-3 is a discontinued product.

The wk4 files were used as the default spreadsheet format of  Lotus 1-2-3 version 4.x.

MIME types:
application/vnd.lotus-1-2-3
application/lotus123
application/x-lotus123
application/wk4
application/x-lotus123
application/x-wk4

This wk4 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

A wk4 file extension is related to the Lotus 1-2-3 spreadsheet editing software, developed by IBM. A wk4 file stores spreadsheet document.

How to open:

Use Lotus 1-2-3 version 4.x or later to open the *.wk3 files.Also some modern spreadsheets programs can still open the *.wk4 files. However the latest versions of Microsoft Excel from 2007 no longer support that format. You can have luck with any earlier version of Excel, but you will probably lose most of the formatting from the .wk4 files.

How to convert:

You can open *.wk4 in Microsoft Excel and save it to another file format. You will probably lose formatting.