[stunpix]

I was searching something for a web page preservation and also considered Safari web-archives, but decided this is a “no go” for me because of private format which is basically a vendor lock. Thus I ended up with a Chrome extension named SingleFile which does a pretty decent job by saving the whole page (or its part) as a single self sufficient html file viewable by any browser. Also html files are easily indexed by Spotlight or other search engines. The extension has no command line though but personally I don’t need that.

[Vegenoid]

The author considered the proprietary nature of the webarchive format, and determined that it was readable without Apple software, and that it wouldn't be too difficult to create a tool to view or transform webarchive files if Safari were to disappear: https://alexwlchan.net/til/2024/whats-inside-safari-webarchi...

Of course, without a working implementation, there could be hidden obstacles.

[PaulHoule]

See https://en.wikipedia.org/wiki/WARC_(file_format)