Tags : 123 format

Cross-Platform 123 File Viewer: Why FileViewPro Works

March 16, 2026 Uncategorized

A .123 file is most commonly a Lotus 1-2-3 spreadsheet, which is essentially an older “Excel-like” workbook format that was widely used in businesses before Excel became the standard. Lotus 1-2-3 was especially dominant in the late 1980s and 1990s, starting on MS-DOS and later appearing on Windows, and it earned its name by bundling …