Embedding an html file in a page

I generate some html locally that contains a list and gets updated fairly frequently. Iʻd like to have that file get slurped up into a WP page for display so I donʻtʻ have to keep editing a page. Right now Iʻm doing it by including the page as an object, but the WP css (1) changes the font and (2) insists on doing a scrolling overflow.

I suppose I could figure out how to change the css for both, but Iʻm wondering if I should be doing this another way. I was thinking of php, but Iʻd like to keep the regular WP page context.

TIA.