Lotus 123 Viewer Site

To understand the importance of a viewer, one must first appreciate the ubiquity of the original file format. Released in 1983 by Lotus Development Corporation, Lotus 1-2-3 was a revolutionary integrated package. Its name derived from its three core capabilities: a spreadsheet, a graphics generator, and a database manager. Before the rise of the graphical user interface (GUI) and the dominance of Microsoft Excel, Lotus 1-2-3 was the standard by which all business productivity was measured. Its native file format, the .WK1 (and later .WK3 and .WK4 ), became a universal language of finance.

Original Lotus 1-2-3 software was 32-bit (or even 16-bit) and often fails to run on modern 64-bit Windows 10 or 11.

: Widely considered the best free tool for legacy formats, it can open most Lotus extensions and allows you to save them as modern .xlsx or .ods files.

The is a free, read-only utility developed by IBM (which acquired Lotus Software in 1995) to allow users to view, copy, and print spreadsheet files created in the legacy Lotus 1-2-3 format (typically .WK1 , .WK3 , .WK4 , and .123 ) without needing the original software installed.