LanguageCTT
Windows Live Messenger contact list file
File type: Settings, options, themes or skins file, Internet related file
Files with ctt suffix can be typically found as old contact files for Window Live Messenger instant messaging client.
Found 2 different file type records with the same ctt filename suffix.
What is ctt file?
File type category:
Settings, options, themes or skins file
Internet related file
Date updated: November 7, 2024
File extension ctt is most likely best known for its use in Microsoft Windows Live Messenger up to version 4.6 and older for its contacts file format.
CTT is a proprietary file format used by Microsoft software. it contains save list of contacts and groups used by the MSN/Live Messenger instant messaging program in XML format. It is used for exporting and importing of whole contact groups.
A typical *.ctt file looks something like this:
<?xml version="1.0"?>
<messenger>
<service name=".NET Messenger Service">
<contactlist>
<contact>first_contact@some_domain.com</contact>
<contact>second_contact@some_domain.com</contact>
<contact>third_contact@some_domain.com</contact>
...
<contact>last_contact@some_domain.com</contact>
</contactlist>
</service>
</messenger>
Microsoft abandoned the use of CTT format in newer versions. Latest versions of MSN grab contacts directly from social networks / e-mail clients or work with CSV format instead. However, it may be still possible to import .ctt file to latest MSN.
Considering the program was replaced by Skype, this file type is more than obsolete now.
How to open ctt file?
You can import .ctt files by selecting File → Import Contact from a Saved file in the application window.
You can view and edit a .ctt in any text editor.
How to convert ctt file?
Because .ctt is a XML based format, there is a way to convert it to CSV format used by the later variants of MSN.
- Rename the CTT file extension to XML file extension
- Open Microsoft Excel (or any good Spreadsheet program) and open in it the file you have just renamed
- Delete the first column (that will leave you with just 1 column of data)
- Save the file in CSV format
Suggested software to open ctt file:
Associated software actions with the ctt file
Software apps that import ctt files:
Windows Live Messenger (Microsoft Windows)
Windows Live Messenger for Mac (Apple macOS / Mac OS X)
Software apps that export ctt files:
Windows Live Messenger (Microsoft Windows)
Windows Live Messenger for Mac (Apple macOS / Mac OS X)
Software apps that manage settings for ctt files:
Windows Live Messenger (Microsoft Windows)
Windows Live Messenger for Mac (Apple macOS / Mac OS X)
LabVIEW control template
File type category:
Various data file
Date updated: February 13, 2019
The ctt file extension is associated with the LabVIEW, a graphical programming platform that helps engineers scale from design to test and from small to large systems.
The ctt file stores template for .ctl control data.
How to open ctt file?
Use LabVIEW to work with *.ctt files.
How to convert ctt file?
Probably can be exported to other formats.
Suggested software to open ctt file:
Associated software actions with the ctt file
Software applications that can open ctt files:
LabVIEW (Microsoft Windows)
Software applications that can edit ctt files:
LabVIEW (Microsoft Windows)
Software capable of saving ctt files:
LabVIEW (Microsoft Windows)
Software apps that create ctt files:
LabVIEW (Microsoft Windows)
Software applications that handle other tasks involving ctt files:
LabVIEW (Microsoft Windows)