Comment by 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.