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archivebox is a totally rad tool for creating your own offline archive of all the web things, plus extracting music and PDF files, etc. A nice companion to the Bookmarks app and easy to deploy in Docker.
https://archive.org is a public archive of the open internet. Easy to create an account and submit your web links if you want them to live forever. The best way to dig up your old Friendster page is through the Wayback Machine. API-extensible.
Wallabag - most popular self-hosted method for archiving your websites ala Pocket or Instapaper. Create a free account with non-profit Framasoft here. Just export your bookmarks and import them into Wallabag.
Nextcloud Paper - Unmaintained app that creates offline archive of web things, like archivebox and wallabag.