In the case of this specific document, there’s all kinds of nasty gappy whitespace in the webpage version.
It’s made worse by the spaces in “et al. 19XX” getting turned into non-breaking spaces. You really want to fix that if you can. For example, look at the 3rd and 9th line in this screenshot. http://i.imgur.com/H6ROnyQ.png
But even disregarding that problem, many lines end up looking pretty bad.
[Note: don’t read this as personal criticism. The fault lies about 90% with the browser vendors who care more about saving a few microseconds of compute time than making legible documents.]
>and if so how How is easy, they are many different programs, here are a few: https://enc.com.au/docs/latexhtml/. Which in particular is a bit harder, there is no <meta name="generator" content="... that some Latex->HTML converter leaves in, but I suspect you could turn that feature off. I think this page uses custom CSS too, as its using Google Fonts.