Opening a WK4 File

The WK4 file type is primarily associated with Lotus 1-2-3.

WK4	File extension: WK4
	File type:	spreadsheet file

What is a WK4 file?

WK4 files mostly belong to Lotus 1-2-3. WK4 files are legacy spreadsheet files that come from the Lotus 1-2-3 series. They organize data in rows and columns and support formulas and basic formatting.
These files were designed for business data tasks and are structured to handle numerical calculations and data organization.
Key details sourced by FilExt.com include:

Format Purpose: To store spreadsheet data in a compact grid format.
Functionality: Allows for basic calculations, data sorting, and organization similar to modern spreadsheets.
Conversion: Although created for Lotus 1-2-3, many modern applications (such as LibreOffice Calc or Microsoft Excel) can import or convert these files.
Legacy Use: They are considered legacy files and may require special handling for conversion or viewing.

FilExt.com note: For further details, visit the IBM website.

How to open a WK4 file

You need a suitable software like Lotus 1-2-3 to open a WK4 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your WK4 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a WK4 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online WK4 File Viewer

Choose your .wk4 file to view

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

How do you convert WK4 files to XLS, XLSX, ODS, CSV, TXT, PDF, ...

You can convert WK4 files using our online WK4 file viewer (powered by Convert.Guru):

To do so, click the "Choose your .wk4 file to view" button above.
Your WK4 file will then be displayed in the browser.
Now click on "Save as..." at the top of the page.
Then choose the desired spreadsheet format (e.g. XLS, XLSX, ODS, CSV, TXT, PDF, ...).
Download the converted file.

Programs that open and convert WK4 files:

Lotus 1-2-3
See the previous paragraphs to learn more about the main application. WK4 files are often referred to as Lotus 1-2-3 spreadsheets because this type of file is primarily created or used by this software.
1-2-3 (Spreadsheet File) by IBM
Lotus 1-2-3 version 4 spreadsheet. This was a Lotus product. Lotus was bought out by IBM. The Mime types used with this association are: application/vnd.lotus-1-2-3, application/lotus123, application/x-lotus123, application/wk4, application/x-lotus123, application/x-wk4. The identifying characters used for this association are - Hex: 00 00 1A 00 02 10 04 00 00 00 00 00. This file format is classified as Spreadsheet.

WK4 file format:

Every file has a defined file format, i.e. how the data is arranged in the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. When there is a problem with a file, the first step to solving it is to determine the file format. Our analysis of the WK4 files produces the following result:

An WK4 file is mainly used by one program with a specific format. But the following two file formats are common:

75% of all WK4 files belong to Lotus 123 Worksheet. They consist of illegible, cryptic characters. The average file size is 24 KB with most files being between 4 KB and 170 KB in size. This file type was primarily in use more than 20 years ago. Such files sometimes refer to lotus.

The remaining 25% of all WK4 files are different files with different signatures. Just click the "Choose your .wk4 file to view" button on this page to find out what your WK4 file is.

Technical Data for WK4 File Extension

File classification:

Spreadsheet

Identifier:

Hex: 00 00 1A 00 02 10 04 00 00 00 00 00 (provided by TrID database)

Related files:

wk1, wk2, wk3, ods, xlsx, 123, wk%21, wr1, fm1, xls, csv

Mime type:

application/vnd.lotus-1-2-3, application/lotus123, application/x-lotus123, application/wk4, application/x-lotus123, application/x-wk4

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: 123Worksheet
EXEFile: C:\lotus\123\123w.exe %1

ProgramID: accessthmltemplate
EXEFile: %ProgramFiles%\Microsoft Office\OFFICE11\MSACCESS.EXE

ProgramID: wk4file
EXEFile: %ProgramFiles%\Verity\KVLotus\KVLOTUS.EXE %1

ProgramID: 123Worksheet
EXEFile: %ProgramFiles%\lotus\123\123w.exe %1

ProgramID: Pagis.EDoc
EXEFile: %ProgramFiles%\ScanSoft\Pagis\EDocView.exe

Show all 5 listings To Top

a wk4 spreadsheet file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with WK4 files

Associate the WK4 file extension with the correct application.
Update your software that should actually open spreadsheet files. Because only the current version supports the latest WK4 file format. Search, therefore, e.g. on the manufacturer website after an available Lotus 1-2-3 update.
To make sure that your WK4 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .WK4 file online - secure, fast, and no downloads needed.