As the MLA Handbook (2.5.2) notes, “When giving a URL,” or Web address, “copy it in full from your Web browser.” Thus, a Web address should generally be set roman and styled lowercase:
The search engine can be found at google.com.
Note, however, that a Web site’s address should not be confused with its title. In MLA style, you should use the title of a Web site as it appears on the site and italicize it as you would any independent work. Do not use the Web address as the title unless the address and the title are identical.
Published 1 April 2019