Add page numbers to PDF

The numbers are drawn straight onto your pages in this tab with the built-in Helvetica font, so nothing uploads and links, form fields, and bookmarks stay exactly as they were. Each stamp is placed in the page's visible box: a page stored sideways (/Rotate 90) still gets an upright number in the viewer.

What this does not do: it cannot number pages of an encrypted file, and it does not touch the body text, so a number can overlap content near the edge you picked. Pick a margin that clears your pages, or use skip-first for cover pages.