What Is an AIT File?
Creating an AIT file is done through the program’sFile>Save as Templatemenu.
How to Open an AIT File
Of course,Adobe Illustratorwill open AIT files.

Some people have had luck usingCorelDRAW, using theImportfunction in that program.
Another option would be to use theFile>Save as Templateoption instead of the regularSave Asmenu.
Some supported formats include AI, FXG,PDF,EPS, andSVG.
Still Can’t kick off the File?
If Illustrator isn’t opening your file, check that you’re reading the file extension correctly.