You can also earn some decent amount of money from Google Adsense without a website. YouTube is the best, fastest and free platform to make money with Adsense.
Make Money with Adsense Through YouTube
YouTube is the world’s second largest search engine. You can earn money with YouTube videos.
Just create your own video (Don’t copy and edit others videos). Then upload it YouTube. After that, Enable YouTube monetization.
If your video goes viral, You will make a good amount of money.
Here is the Guide for Making money with YouTube.
Make Money with Adsense Through Game
You can also earn money with your HTML5 web games Google’s Interactive Media Ads (IMA) SDK. The integration is very simple with integration option.
Check out this guide AdSense for games