Sharing a project (not my own, though I’ve contributed) that might be of interest here! Monolith is a tool that downloads a web page and all linked assets into a single, browser-viewable HTML document that you can squirrel away and keep forever. A lot of work has gone into making sure that Monolith is able to recreate the page as close to it’s normal state as we can without needing any non-local assets or even more than one file.
If y’all wanna check it out, it’s open source at Y2Z/monolith on Github!
― Emi (she | they)