I have one website which have not extension like .html and saying it is html. Is it right or wrong? Now is it possible to make that pages with .html extension or no?
HTML stands for hyper text markup language and someone may think that extension can only have .htm or .html. But it is totally wrong & Extension can have lot of Hypertext Markup Language file types such as .php, .xml, .asp, ,jsp. So what you need to identified that html is not a programming language and it is just only stands. What kind of extension currently do you have ?
Well there is no need of adding .html or .htm in the end of your each url.It was a very old concept that all web page url should end with .html extension.I am not agree with horsey67745 , adding .html do not helps you in seo.