Insert numbers in the position and format you want.
Numbering matters as soon as a document is going to be discussed. Court filings, tenders, assignments and contracts all need someone to be able to say 'see page fourteen' and have everyone land in the same place.
Documents assembled from several sources rarely have numbers, or have three conflicting sets. This adds one clean sequence over whatever is already there. The numbers are real text, so they stay sharp when printed and can be searched.
Yes. Set the starting number, which is what you want when a cover page is not counted or the document continues from an earlier volume.
They are placed in the page margin, but a document with an unusually full footer could overlap. Check the result and move the position if it clashes.
Not directly. Split the cover off, number the rest, then merge the two back together.
Yes, drawn as text rather than images, so they print sharply and can be found by search.
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.