Add file extension

File extension KCT

The most common cause of problems with opening the KCT file is simply the lack of appropriate applications installed on your computer. In this case, it is sufficient to find, download and install an application that supports the KCT file format - this type of programs are available below.

File type Keyman Developer Customization Source
Developer Tavultesoft



It should be noted that some coded data from files that your computer does not read can be sometimes previewed in a Notepad. This way, we will read passages of a text or numbers. It is worth checking if this method can also be applied to the KCT files.

What should be done when an application from the list has already been installed?

Often, an installed application should automatically link to a KCT file. If it did not happen, the KCT file can be linked with the newly installed application manually. Simply right-click on the KCT file, then from the available list select "Choose default program". Next, select "Browse" and find the application you selected. These changes have to be confirmed by pressing the "OK" button.

Programs that can open the KCT file

  • Keyman DeveloperKeyman Developer

Why can’t I open the KCT file?

However, problems with the KCT files can also have a different background. Sometimes even the software, installed on your computer, that supports the KCT files does not solve the problem. The reason for the fact that the KCT file can’t be opened and used can also be:

- an incorrect link to the KCT file in the registry entries
- corruption of a KCT file, that you want to open
- infection of a KCT file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the KCT file from the Windows registry
- incomplete installation of the program that supports a KCT file?

Solving these problems should allow the free opening and working with the KCT files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.

My computer does not show file extensions, what should I do?

In the standard Windows settings, a computer user cannot see the KCT file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the KCT files should be displayed after the file name.