Delete PDF Pages

Most of the requests I get for this tool boil down to the same thing: someone has a PDF where a blank page snuck in from a duplex scan, or there's a cover sheet a fax machine added, or a page needs to come out before the document goes to someone who shouldn't see it. Deleting a page sounds trivial until you're staring at a 40-page contract trying to figure out which page 14 actually is.

How it works

Under the hood, deleting pages doesn't edit the existing file in place — it builds a brand-new PDF and copies over every page except the ones you marked, using pdf-lib. Fonts, embedded images, annotations, form fields, all of it comes along untouched for the pages that survive. Nothing is re-compressed or re-rendered, so there's no quality hit. The output is just... smaller, because it has fewer pages in it.

The part that catches people off guard: the numbers on the page thumbnails in this tool are the document's physical page index (1, 2, 3, in file order), not whatever page numbers are printed on the pages themselves. If your PDF has a cover page and a table of contents before the numbered content starts, "page 5" in the grid might be printed as "page 2" on the sheet. Always go by the thumbnail preview, not a page number you remember from reading the document.

A real example

A 16-page PDF from a duplex scanner where every other page (2, 4, 6, 8, 10, 12, 14, 16) came out blank because the original document was single-sided but got fed through a double-sided scanner. Rather than clicking each one individually, the smart-detection banner flags all 8 blank pages automatically — one click removes them, leaving an 8-page document that's just the actual content, renumbered 1 through 8.

Common mistakes

• Selecting by memory instead of by thumbnail. "Page 6 has the signature, delete everything after it" is how people lose the signature page. Scroll through and confirm visually before you commit — the undo history helps, but it's better not to need it.
• Deleting pages for privacy and assuming that's the same as redaction. If your goal is removing a page that contains sensitive info entirely from the document, deletion works fine — the page is genuinely gone from the output file. But if you're trying to black out a detail on a page you're keeping, that's a different job (see the Crop PDF guide for why cropping isn't redaction either — same logic applies more broadly).
• Not noticing the duplicate-page detector. Documents that got scanned twice by accident, or re-uploaded and merged with themselves, often have exact duplicate pages. The tool flags these automatically — worth checking even if you came here to delete something specific.