Rotate PDF pages

No — rotation changes how a page is displayed, not its content.

Yes, and that is the point. Most PDF readers let you rotate the view on screen, but it resets when you reopen the file and everyone else still sees it sideways — which is why a document can look fine to you and wrong to the person you sent it to. This changes the page orientation stored in the file itself, so it is correct in any reader.

Not with this tool — the angle you choose is applied to every page in the document. For a file where only a few pages were scanned sideways, use Organize PDF Pages instead: it shows every page as a thumbnail and lets you rotate them individually before saving. That is the right tool for a mixed-orientation scan.

No. Rotation changes one orientation value per page and nothing else — no re-rendering, no recompression — so text stays sharp, images keep their resolution, and the file comes out essentially the same size as it went in. It is one of the genuinely lossless operations, unlike compression or converting to images.

The angle you choose is added to the rotation each page already has rather than replacing it, so a page stored at 90 degrees turned by another 90 ends at 180. If a document holds pages at different angles, one turn applied to all of them cannot fix it — Organize PDF Pages rotates each page on its own.

No, and no PDF tool can: a page's rotation is a property with four legal values, not a free angle. A scan that is a few degrees crooked can only be straightened by re-rendering the page, which costs the text layer, so this tool does not offer it.