Script written in KiXtart, a free-format scripting language; includes built-in functionality for easy scripting and supports Active Directory Services Interface (ADSI), ActiveX Data Objects (ADO), and Windows Management Instrumentation (WMI) functions. kix Extension - List of programs that can open. Details for file extension: KIX - KiXtart Script Troubleshoot, fix and learn about KIX and errors with extensive information from Filext. KIX files are a type of KiXtart Script File developed for Notepad++ by Don Ho. KIX extension is associated with Kixtart Script File.