What is .AU3 file extension?
Automated script created with AutoIt v3, a freeware scripting program that uses a programming language similar to BASIC; designed for automating commands within Windows and for other general scripting purposes.
AutoIt can simulate keystrokes, mouse movement, and manipulate windows, which can automate tasks that are not possible with VBScript or SendKeys.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.