Actually, this is what [Web Bundles](https://web.dev/web-bundles/) are meant to do: > A Web Bundle is a file format for encapsulating one or more HTTP resources in a single file. It can include one or more HTML files, JavaScript ... It has support for signing, and basically allow you to provide an offline copy of an entire website. See also [the explainer](https://github.com/WICG/webpackage/blob/master/explainer.md). Sadly it doesn't quite replace PDF because PDF has provisions for paging afaik, and this is just a way to encapsulate websites.