Two jobs live under one word here, and it is worth being clear about which one you want. Cutting it up turns one document into several — a hundred-page batch of invoices becoming a hundred invoices. Taking some out keeps only the pages you name and leaves everything else where it was — pulling three pages out of a contract to send on.
The interesting part is where the cuts go. Most tools ask you to type page ranges into a text box, which means counting pages in one window and typing numbers in another. Here the cuts are clickable gaps between the pages themselves: click between page 3 and page 4 and that is where it cuts. The output list updates as you click, so you can see that you are about to make two files of three and five pages rather than discovering it afterwards.
Typing still works, because sometimes you already know. “1-3, 8” selects those pages, and clicking a page adds or removes it from the same selection — the field and the pages stay in step in both directions. If you type a page number the document does not have, it says so rather than quietly dropping it.
People split for three reasons, and the flow is the same for all of them: pulling one chapter out of a manual to read on a phone, dropping the sections a client does not need, or sending only the two pages a question was about. In each case the selected pages become a new document in the order you chose them, with any notes or form answers you had already made carried along and named in the receipt, so nothing you did is silently lost on the way out.
What comes out is named predictably and listed before you commit. A single file downloads on its own; several arrive as a zip, and the panel says which is about to happen.
Your original file is not modified. Everything runs in this browser, with no upload and no page limit.