I've been using a webapp I build to do the same thing, and I've really enjoyed it.
Example: https://yazzy.carter.works/https://paulgraham.com/submarine....
https://github.com/carterworks/yazzy
It uses Steph Ango's/kepano's defuddle under the hood.
The live version is hosted on a single free-tier fly.io node, but it is easily self-hosted.