Type the pages you want, drop the PDF, download a new document holding just those pages. 1 pulls the first page; 2-5 pulls four; 1-3, 7 mixes ranges and singles.
The order you type is the order you get. 3, 1 produces a two-page document with page three first, and reordering a PDF is the same move as extracting from it. Repeats are honoured too: type a page twice and it appears twice.
Deleting pages is extracting the rest. To drop page 4 from a 9-page file, ask for 1-3, 5-9. The tool copies rather than edits. The file you dropped is untouched either way.
Pages copy whole. Size, rotation, images and text come across exactly, with nothing re-rendered or recompressed. Asking for a page that does not exist gets a plain message with the document's page count, rather than a silently empty file.
Batches work. Drop five PDFs and the same page spec applies to each, with a ZIP at the end - made for pulling the first page from a stack of invoices, or the signature page from a folder of contracts.