Add Page Numbers to PDF

Adding page numbers to a PDF stamps a sequential number onto each page so the document can be referenced, printed, and bound in order. This tool overlays those numbers as text using the pdf-lib library, running entirely in your browser, so the file is never uploaded. You choose where the number sits, at the top or bottom of the page, aligned left, center, or right, and you can set a custom starting value. The starting number is the feature people reach for most often: if your PDF continues a larger work, you might begin at 5 so it picks up where the previous section ended, and the count increments from there. One behavior to be aware of is that the tool overlays new numbers without detecting or removing any numbers already printed in the document. If the source pages already carry page numbers, you will end up with two sets, so it is best used on documents that have none, or after stripping existing ones. The numbering currently applies to every page, which means a cover or title page cannot yet be skipped, and selective numbering is a planned addition. Numbers are drawn in a clean system sans-serif font at a readable, unobtrusive size and placed to sit clear of typical page content. Common uses include paginating a thesis or report before submission, numbering a contract for clause-by-clause reference, adding indicators to a deck exported as a PDF, and giving a merged document from many sources a single consistent sequence. Because the operation is local, even confidential reports and legal documents stay on your device while they are numbered.