The QTI - QuickTime Image File is a file which is of an image which was created using the Quicktime program by Apple. Since you will know what this extension means you can easily find the proper program to open the files up with, but also will find out more information about how you should be using the files and if you can edit them using the program you are working with or plan on using.
File Extension QTI
Product(s) that can open QTI file
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