How to deal with HTML in "rich text" columns?

I imported 300 rows of data from Infinity and one of the columns was their “Long Text” which is, essentially, a rich text field. It came in as HTML (without even any carriage returns - just one wall of text with html tags embedded, ergh) - which is super hard to read/work with. Is there some way that I can convert the HTML into rich text so that I can let people view/edit it within Grist’s Notepad widget?

(or is there some other option you can think of that will allow people to view/edit that text?)

Thanks!
Abby