Html5 local how to do?

Hello guys good afternoon, I have a doubt if anyone can help me, I’m trying to run a game made in html5 in the kodular project however despite looking at the forums I didn’t find a definitive answer that works without extensions, is it possible? it would be a game and not just the index html, for example folders, image… in html 5, who can help me… because it would be an interesting alternative for those who make games in html and want to export to android, thanks