It looks like all it is is an html table styled with css right inside the file. And it is just only big html file. So, in theory, all you would have to do is:
- Get the export from reddit (I think it is a .csv)
- Convert the CSV to html (there are online converters for that)
- Add the CSS that you want.
- Find somewhere to host (Like github pages)
That’s it.
This is exactly why I keep all my notes in Markdown and view via Mkdocs.