AutoIt is a freeware automation language for Microsoft Windows. In its earliest release, the software was primarily intended to create automation scripts (sometimes called macros) for Microsoft Windows programs but has since grown to include enhancements in both programming language design and overall functionality.

An AutoIt automation script can be compiled into a compressed, stand-alone executable which can be run on computers that do not have the AutoIt interpreter installed. A wide range of function libraries (known as UDF's, or "User Defined Functions") are also included as standard or are available from the website to add specialized functionality. AutoIt is also distributed with an IDE based on the free SciTE editor. The compiler and help text are fully integrated and provide a de facto standard environment for developers using AutoIt.

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