WK3 File Extension
Lotus 3 Worksheet
- File Type wk3
- Developer IBM
- Popularity
- Application Lotus 1-2-3
- Category Spreadsheet Files
- Format Binary
What is a WK3 file?
The WK3 file extension is linked to Lotus 3 Worksheet and belongs to the Spreadsheet Files category, which includes 113 files.
With the creation of the Lotus 3 Worksheet (WK3), IBM introduced file format along with 70 programs built for their use.
WK3 files are supported by Windows, Mac OS and Linux. You can open a WK3 file using one of 8 programs, for example Lotus 1-2-3, LibreOffice Calc and OpenOffice Calc.
MIME types
- application/x-123
- application/x-wk3
- application/vnd.lotus-1-2-3
- application/x-lotus123
- application/lotus123
- application/wk3
Programs that support WK3 files
How to open a WK3 file?
The most common reason why a WK3 file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
The most popular programs for working with WK3 files are Lotus 1-2-3, LibreOffice Calc and OpenOffice Calc. To get the latest version of Lotus 1-2-3, open the IBM website where a universal installer for all operating systems is available.
Following installation, WK3 files should be automatically opened with Lotus 1-2-3.
Set Lotus 1-2-3 as the default WK3 program
Changing the default program in Windows
- Start by right-clicking on your WK3 file and selecting the "Open With" option. From there, click "Choose another app" to continue;
- In the pop-up window, select the Lotus 1-2-3 application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening WK3 files.
Change Default Program on Mac
- Right click or Control + left click on the desired WK3 file;
- Select "Open in application" and click "Other";
- Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
- Within this menu select "All Programs" and navigate to Lotus 1-2-3. Check the box next to "Always open in app" to make sure it’s the default option.
Convert to and from WK3
If a WK3 file is difficult to handle, you might try converting it to formats such as XLS, DOC, XLSX, ACCDB, QPW or similar, which may be easier to work with.
Please note that after converting a WK3 file, some functionality may differ from the original. However, in many cases, it can be converted back to its original format.
Using offline applications such as Lotus 1-2-3 and Corel Quattro Pro, you can convert WK3 files to various formats without losing data quality.
Convert WK3 to other file formats
Solve problems with WK3 files
When issues arise with WK3 files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.
What are the signs that my WK3 file is damaged?
Corrupted WK3 spreadsheet files may have one or more of the following symptoms:
- Poor performance when editing a file in Lotus 1-2-3;
- File hangs or crashes in Lotus 1-2-3 or other programs;
- The file does not open or opens with errors;
- Unexplained increase in WK3 file size;
- Working with the file triggers the display of error messages;
Why does Lotus 1-2-3 quit or crash unexpectedly?
Lotus 1-2-3 crashes can be attributed to outdated software. Make sure you have installed the latest updates for IBM products.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
What methods can be used to repair a damaged WK3 file?
Use a recovery program to open the damaged WK3 file and navigate to the "Repair" menu item. Then wait for the recovery process to complete, which allows you to automatically repair corrupted spreadsheet files.
How to edit a WK3 file?
To edit WK3 files, you need to install specialized software that allows you not only to open but also to modify spreadsheet files. Online WK3 editors usually provide fewer features than software created specifically for Lotus 3 Worksheet.
Best WK3 editors in 2026
Taking into account the provided details, we have prepared a list of WK3 editors that match your needs.
| WK3 Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Corel Quattro Pro | Corel | Windows | 4.4 out of 5 (40 reviews) |
| Lotus 1-2-3 | IBM | Windows | 4.4 out of 5 (41 review) |