QRix
Add automatic page numbers to your PDF in any position and format.
This tool stamps page numbers onto every page of your PDF. Choose where they appear (corners or center, top or bottom) and the format (plain number, 'n / total', or 'Page n'). Everything runs in your browser — your file is never uploaded. Perfect for reports, contracts, books and assignments that need clear pagination.
It's free, private and works right in your browser — no signup, no watermark.