What is the Purpose of the .ctt File Extension?

What is the .ctt file extension?

The file extension .ctt is associated with Windows Live Messenger (earlier known as MSN Messenger), which is a free instant messaging software from Microsoft for Windows operating systems. .ctt files fall under the category of Data files.

Purpose of files with the .ctt file extension

Files with the .ctt file extension are used by Windows Live Messenger (WLM) to store a backup of user?s list of contacts and groups. The .ctt file type is used for importing and exporting a contact list from Windows Live Messenger. These are text files in the XML format and users can easily open .ctt files using a text editor, such as Notepad.

Steps to backup your contact list

  1. Open Windows Live Messenger.
  2. Next, click the down arrow present at the top of the Windows Live Messenger?s window.
  3. Click the Contacts menu and select Save Instant Messaging Contacts.
  4. Click the Save button to save the file in the desired location (The default location is set as My Documents).

The contact list will be saved in the .ctt file format.

Steps to restore your contact list

  1. Open Windows Live Messenger.
  2. Next, click the down arrow present at the top of the Windows Live Messenger?s window and then click the Contacts menu.
  3. Now, click Import Instant Messaging Contacts.
  4. Browse to the .ctt (contact list) file you want to import and click the Open button.

How to open a .ctt file in Windows

You may open a .ctt file in Windows using any of the programs listed below:

  • Microsoft Windows Live Messenger.
  • Any text editor, such as Notepad.

Other instances of the .ctt file type

The .ctt file extension is also recorded as a LabVIEW file. LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) is a graphical programming environment used mostly by engineers and scientists.

Little is known about this .ctt file type (LabVIEW file), its behavior, or purpose.

Unable to open a .ctt (Windows Live Messenger Contact List) file with notepad?

Try opening the file with some other text editor or Windows Live Messenger. If you fail, chances are that the .ctt file you are trying to open is corrupt. To fix the issue, simply use FileCure, which is a reliable file extension repair program that correctly diagnoses and fixes various file-related issues.