As usual, there are several ways to do it. And if you are now being asked to produce the output of a script in a browser window you probably want to step back and look at the bigger requirement. You don't want to do one thing, then watch the scope “creep,” and thereby have to do that one-thing over and over again.

If the request is “show me this in a browser,” then the request is probably, “put this into a web-site.” Does such a “web site” exist now, or are you being asked to build that, too?

Let's go for the easy-assumption:   that miraculously an existing site does exist. In that case, you might be able to arrange for a CGI-handler to somehow invoke your script as a child, (back-tick?) capture the output, and insert it into an html <code> tag. Cheep-n-dirty but maybe it will work.

The key point now is that “there are several ‘things that will work,’ and you need to know which one to pursue.” You need to formalize this program's true requirements before trying to select the way to build it.