Common reasons to delete pages
Scanners love to produce blank back sides. Documents downloaded from portals come with advertising pages or a terms sheet on the end. Contracts may include a page of personal notes you would rather not forward. Deleting these takes seconds and makes the file shorter and tidier.
It also reduces size. A scan with ten stray blank pages at 300 dpi can carry several megabytes of nothing.
Another frequent case is a form pack where you only need to submit some of the sections. Removing the rest lets you send exactly what was asked for, with no confusing extras.
Pick pages visually
Thumbnails let you see what you are removing, which helps when page numbers in the footer differ from the file position. Tap or click a page to mark it. You can also type a range such as 3-5, or a list such as 1,8,12.
Before you download, count the pages left. A quick mistake, like marking page 10 instead of 1, is easier to catch on the thumbnails than after you have sent the file.
If you are cleaning a scan, look for pages that appear pure white in the thumbnail. Be careful with nearly blank pages that carry a small note or a page number, since those can matter.
On a phone, tapping small thumbnails can be fiddly. Typing the page numbers into the field is more precise there, and you can still glance at the thumbnails to check your list.
Deleting is not the same as redacting
Removing a page takes it out of the new file entirely. That is different from covering text on a page with a black box, which often leaves the words underneath. If sensitive content sits on a page you keep, remove the whole page, or use proper redaction in a dedicated editor before sharing.
Also remember that metadata such as the title and author stays in the document properties unless you strip it separately.
Related tools
To reorder pages after cleaning, use organize PDF. To keep just a few pages, extract pages is the faster path. To make the file smaller still, finish with compress PDF. Files can be up to 100 MB, and password-protected PDFs are not supported.
A typical cleanup order is delete, then organize, then compress. Doing the deletion first keeps the later steps quick, because each one works with a smaller file.
If you are not sure which pages are junk, scroll the thumbnails first and note the numbers, then enter the list in one go. It saves you from deleting a page, realizing your mistake and starting again.