Mapping html file url

Hi,

First of all, I want to apologise if there is a post about this, I haven’t found it.
In my work, I’m required to upload an html file to the root directory of my worpress installation, to work with the pages of worpress.
The problem is when I go to that page, the url look like: https://www.example.com/file.html but I want to change it to https://www.example.com/file/
Is it possible?

Thank you in advance!