The most reliable way how to work with ancient Lotus 1-2-3 spreadsheets (.wk1, .wk4 etc.) would be to use the original tool, perhaps in a virtual machine. If you do not have access to the original tool, you will have to use some 3rd party software for the job, for example some open source productivity suites that may still support old Lotus 1-2-3 formats.
Convert Lotus 1-2-3 version 2.x spreadsheet to Lotus 1-2-3 version 4.x spreadsheet.
We found 4 software records in the database related to .wk1 to .wk4 file format conversion.
Microsoft Windows software - convert wk1 to wk4 on Windows
Old spreadsheet program from IBM
Convert from wk1 file format
|Yes, Lotus 1-2-3 supports wk1 file conversion as a source file type.||Yes||Yes||wk1 editor||Yes||No||No||No|
|Yes, Lotus 1-2-3 supports wk4 file conversion as a target file type.||Yes||Yes||wk4 editor||Yes||No||No||No|
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned wk1 to wk4. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A spreadsheet software application from Corel
A popular spreadsheet application distributed with Microsoft Office suite
Multiplatform software - convert wk1 to wk4 on any platform
Full-featured spreadsheet tool from LibreOffice suite