What is .QML file extension?
A QML file will always start with at least one import statement (since QML does not import any modules by default an import statement is necessary, or else no elements will be available). Here is a basic example of a QML file:
import QtQuick 1.0
width: 120; height: 160;
text: modelData.firstName + " " + modelData.lastName
You can see a list of software programs here on 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.