Convert WK4 files online for free
The converter easily converts your WK4 file to various formats - free and online. No Excel or extra software needed.
The converter also works in reverse, so you can convert other Spreadsheet formats to WK4 with high quality output.
A .WK4 file is a legacy spreadsheet created by Lotus 1-2-3 Release 4, the once-dominant spreadsheet application developed by Lotus Software (later acquired by IBM). These files store rows and columns of data, formulas, macros, and basic chart definitions typical of early 1990s office environments.
Because Lotus 1-2-3 has been discontinued since 2013, opening .WK4 files is a significant challenge for modern users. Current versions of Microsoft Excel (2013 and later) have completely removed the native file filters required to open Lotus files, meaning you cannot simply double-click them. While older copies of Excel (2003/2007) could import them, finding working installations is difficult. Relying on the original proprietary software requires running emulated DOS or Windows 3.1 environments, which is impractical for most workflows.
To access your historical data, the best approach is converting the file to a modern standard. For continued editing and calculation, convert to XLSX (modern Excel) or ODS (OpenDocument). If you only need to extract the raw numbers for a database or script, converting to CSV eliminates potential formatting errors. For legal archiving where the visual layout must be preserved, convert the spreadsheet to PDF.
Use Convert.Guru to open and convert your WK4 file.
Users also converted 123, WK3, WK1, WPD, SAM, FM3, XLSX, LWP, CFG, JPG, ZIP and XLS files.
If you want to convert WK4 file to XLSM, XLSB, WK1 or WK3, you can use Lotus 1-2-3 or similar software from the "Legacy Spreadsheet Storage" category. In the File menu, look for Save As… or Export….
To convert WQ1, XLSM, NOTES, QPW, WK3, WB2, WKS, XLSB, 123, XLS, WB1 or XLSX files to WK4, try Lotus 1-2-3 or another comparable tool in the "Legacy Spreadsheet Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our WK4 converter.