Ah, ok, so you want a PDF-like single file but in HTML in a way that's more efficient/scalable than the built-in singlehtml builder. Ok fair enough. For my use

Ah, ok, so you want a PDF-like single file but in HTML in a way that's more efficient/scalable than the built-in singlehtml builder. Ok fair enough. For my use cases, the default multi-file HTML builds are ok, and I just pound out a latex-builder generated PDF for the archives.