The new database feature on NostrSync.live is now supported on Safari and NostrNet.work as well.

You can easily fetch, download, manage, and broadcast your Nostr data with just one click, all in one place. 

Entire backup only takes a few minutes. I will keep enhancing it.
https://video.nostr.build/f10879a1daf56f13fe87326e766db66ad905cd6cccd188f679052eabbf481ede.mp4