I created a script to export and import bookmarks from the following sites:

- mangakakalot.gg
- nelomanga.com
- natomanga.com
- manganato.gg
- mangakakalot.fun (export only — no import support)

How It Works
Export: On the bookmarks page, you’ll see a new "Export Bookmarks" button along with a CSV/Text file type selector.
- Choose your preferred format and click Export Bookmarks to download your bookmarks.
- Each entry includes the manga/manhwa/manhua name, the last chapter you viewed, and (in CSV files) a unique ID.

Import: CSV files exported with this script can also be imported back into supported sites (except for mangakakalot.fun).

I originally created this script after losing all my bookmarks during a host migration. Tracking them down again was a pain, so now backups and restores can done easily and whenever needed.