Turn each page into an image you can post, paste or edit.
Images go places PDFs cannot. A page you want in a slide deck, attached to a message or dropped into a design file is far easier to handle as a JPG.
Resolution is the choice that matters: 72 dpi is fine for screens, 144 dpi is a good default, and higher is worth the larger files only if the images will be printed or cropped into.
72 dpi for something only ever viewed on screen. 144 dpi is the sensible default and holds up when zoomed. 216 or 288 dpi produce large files but survive printing and cropping.
Use Extract pages first to pull out the page you want, then convert that single-page file here.
A thirty-page document produces thirty images, and browsers cannot save that many files in one action. The ZIP keeps them together, named in page order.
JPG for scanned or photographic pages, where it is far smaller with no visible loss. PNG for pages of text, diagrams or flat colour, where it keeps edges crisp.
Combine PDFs in any order you like.
Break one PDF into many, or take a range.
Delete the pages you don't need.
Keep only the pages you pick.
Rearrange, rotate and drop pages.
Turn pages the right way up.
Make an oversized PDF fit.
Photos and scans into one PDF.