Convert WIA to EXE

There is no way how you could simply convert Nintendo WIi ISO archive to some executable for Windows so you can launch it on your computer. In order to that, you need to install some Nintendo Wii emulator for PC like the Dolphin, which should be capable of wia to exe conversion just fine.

Simply put, it is impossible to convert WIA to EXE directly.
Thus, there is no so-called wia to exe converter or a free online .wia to .exe converter to be found.