Single-file HTML or PDF: what you actually keep
A saved page is only useful if it still looks like the page you meant to keep. PDF and single-file HTML both get you there, but they freeze different layers of the same document, and one of them quietly drops things you may want back.
What a PDF keeps
A PDF keeps the printed impression of a page: the layout at one width, the fonts that were used to draw it, and the text as positioned glyphs. Links survive if the generator wrote them. What does not survive is the structure underneath. A table becomes lines and letters rather than rows and cells, a heading becomes bold text rather than a heading, and long pages get sliced into sheets that no longer scroll as one thing.
What single-file HTML keeps
A single-file HTML save inlines the stylesheets, images and fonts into one document, so it opens in any browser with no folder of loose assets beside it. Because it is still HTML, headings stay headings, tables stay tables, and the text is selectable and searchable exactly as it was. The trade is size: base64-encoded images inflate by roughly a third, and a heavy article page can land at several megabytes.
Where PDF still wins
If the thing you need is evidence of what a page said on a given day, PDF is the safer artefact. It is harder to alter without leaving traces, it prints predictably, and every operating system opens it without a browser. Invoices, receipts, booking confirmations and policy pages are all better as PDF, because you are keeping a record rather than a reading experience.
Where HTML wins
Reference material you will come back to rewards HTML. Documentation, long forum threads, recipes, tutorials and anything with tables or code blocks stay usable when they stay structured. You can search inside them, copy a snippet out, or re-open them at a different window width and still read the page comfortably.
A habit that covers both
Keep receipts and confirmations as PDF, keep reading material as single-file HTML, and name both with the date in front so a folder sorts chronologically. It also helps to save the page once, not twice: a duplicate save made an hour later often captures a page that has already changed.
