As of today, Wallabag can export the articles in several format (JSON, CSV, EPUB, etc.), but doesn't allow HTML.
This script intends to convert the JSON export to HTML in order to allow you to import the bookmarks into another bookmarks manager like Buku or Shiori.
Note: the conversion from JSON to HTML is not perfect. Wallabag stores the pages content, but not their description. So a part of the content as used as description when possible.
You need to install one gem:
gem install sanitize
./json_to_html_bookmarks.rb import-file [export-file]
If you don't specify the export-file name, its default name will be exported_bookmarks.html