You must be eager to know what an HTML file is, the files that have extension as html are known as html. It is also known as Hypertext Markup Language. The pages that are being accessed using internet are in html format. Nowadays, you can access internet using your Smartphone, iPhones, mobiles etc. you can even save them in your memory card. And if the html file gets deleted from the memory card, then how can these file be recovered.