A WK1 file is a spreadsheet file format associated with Lotus 1-2-3, one of the earliest spreadsheet software applications. Developed by Lotus Development Corporation, Lotus 1-2-3 was widely used in the 1980s and early 1990s before being succeeded by other spreadsheet programs like Microsoft Excel. The WK1 file extension specifically refers to spreadsheet files created and saved in the Lotus 1-2-3 version 2.x format.

What is a WK1 File?

A WK1 file is a spreadsheet file that contains data arranged in rows and columns. It may include numerical data, formulas, text, and formatting. Lotus 1-2-3 was known for its role in popularizing the use of spreadsheets for business and personal finance applications.

How to Open WK1 Files:

Opening WK1 files can be challenging today, as Lotus 1-2-3 is outdated and no longer widely supported. However, here are some approaches to access the data in WK1 files:

1. Use Lotus 1-2-3:

2. Convert to a Modern Format:

3. Use Spreadsheet Software:

Various Apps that Use WK1 Files:

Given the age of the Lotus 1-2-3 software, finding contemporary applications that actively use WK1 files may be difficult. However, some tools and methods can help you work with WK1 files:
OpenOffice Calc
LibreOffice
LibreOffice Calc
Microsoft Office