[geofft]

The suggestion, I think, is to put the code in the URL itself, not use the URL as a pointer.

You could probably use a data: URL to avoid needing a server at all, but if not, the server would just provide a launcher and not host the application code.

[codetrotter]

If the binary data is too big to fit in QR, then URL encoding is only going to require more bytes, and it will not fit either.