How can I check if my website appears correctly in mobil devices?

I am learning web design, and I can make basic web sites on Windows desktop. My question is, how can I check this site if it appears correctly in other devices like Android or iPhone. I want to see it from my website directory on device, not from a "html://www.example.com". I don't want to buy a domain name for now, because, I want to learn web designing first. Also, I don't have iPhone, I don't know what to do. How can I see my website from a mobile device, or a tablet, even I don't possess it?