The blank page remover finds empty pages in a PDF and takes them out automatically. It is handy for double-sided scans with empty backs, extra pages created when exporting from Word, or separator sheets in merged files. Each page is rendered small in your browser and the amount of text or images on it is measured; scanner shadows at the edges are ignored. Choose the sensitivity: only fully white pages, or also nearly blank pages with light specks. All other pages stay exactly as they are. The result lists the removed page numbers.
Pages with very little on them (for example only a page number) may be removed with the “nearly blank” option. For important documents start with “Only completely blank pages” and check the page numbers in the result. Your original file is not changed.
Yes, use Delete PDF Pages for that.
No. Pages are checked in your browser and the file is never sent to a server.