This is really cool! Suggestion: find a small MSI file that you can host as part of the demo and add a "load example file" button - that way people can try it out even if they don't have an MSI file to hand already.

I feel like this would also solve the "I just need the printer driver file(s), not everything else" use-case. Nice work.

I was there at Microsoft in the beginning of MSI, which was what, Office XP? Gosh or was it 2003? The tooling for dealing with them was super jank then. I could have never predicted that you'd be able to just casually open it in a browser. Nice job man!

Neat. I usually just use 7zip to open .exe and .msi files.

As a side note, I just tried it in mobile Safari on my iPhone -- at least inspecting MSI files works, extracting files may work as well (not sure where it is placing the "downloaded" zip file).