Opening 123 files

Did your computer fail to open a 123 file? We explain what 123 files are and recommend software that we know can open or convert your 123 files.

What is a 123 file?

Files that contain the .123 file extension are most commonly used by the Lotus 1-2-3 spreadsheet software application. The program was initially developed by Lotus, which was later acquired by IBM. The spreadsheet application was most popular in the mid 1980s. Over the years, the popularity of the Lotus 1-2-3 application was replaced by Microsoft's Excel.

The 123 files that are created by the Lotus 1-2-3 program contain spreadsheet data files that have been created within the software.

The .123 file extension is also used for circuit board designs that have been created by the PCB123 circuit board prototype tool.

Try a universal file viewer

In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.

By Prof. Jones (The File Expert)

Chief Content Editor and File Expert

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