Mac's Preview app does not have a built-in page numbering feature. Here is how to add page numbers to any PDF on Mac for free using a browser-based tool that gives you full control over format and positioning.
Go to pdfeditor.onl/page-numbers on your Mac. No download or installation required.
Drag the PDF from your Finder window into the browser upload area, or click Browse and navigate to the file.
Choose position (bottom-center is standard), format (Page 1, 1 of N, etc.), font size, color, and opacity. Set a start number and optionally skip the first page.
Tip: For academic papers, use bottom-center with format "Page 1 of N" in 9pt Helvetica. For legal documents, bottom-right with just the number is conventional.
Click Download PDF. The file saves to your Mac Downloads folder. Open it in Preview to confirm the numbers look correct.
No. Preview can view and annotate PDFs but cannot add automatic page numbers across all pages. The browser-based tool fills this gap.
Yes. Page numbers are embedded as real PDF text objects — they print exactly as they appear on screen.