Type the pages you want — 1, 4-6, 12 — and get a new PDF containing exactly those, in that order of appearance. It is the mirror of the delete tool and exists because saying what to keep is far less error-prone than working out what to remove: on a 200 page report, "keep 88-94" is one thought, while its complement is two ranges and a chance to get an edge wrong.
The PDF engine (about 500 KB) loads only when you drop a file in, so the page itself stays light. Your file is read on your own machine and never sent anywhere — open your browser's network tab and watch while you use it.
Single pages and ranges separated by commas: 1, 4-6, 12. Pages are numbered as you see them, starting at one. Anything outside the document is ignored rather than treated as an error, so a range that runs past the end simply stops at the end.
No. The pages are copied across as they are — same text, same images, same fonts, same resolution. Nothing is re-rendered or re-compressed, so the extract is byte-for-byte the same content in a smaller file.
Links that point outside the extracted pages will not lead anywhere useful, since their targets are no longer in the file, and the bookmark tree is not carried over. The page content itself is intact; it is the navigation that a partial document cannot keep.
No — the pages come out in document order regardless of how you type the list. Use the reorder tool afterwards if you need a different sequence; keeping the two jobs separate means neither one does something you did not ask for.
These all work the same way — in your browser. Most are free; the ones marked as needing a plan are not.