With 9PDF, you can easily add page numbers to your PDF.
To begin, drag and drop your PDF file into the upload box at the top of the screen.
Next, customize the following settings:
Page Number Format: Choose format of page numbers. (Default: Page 1 of X, Page 2 of X, etc.)
Pages to Number: Choose pages to number. Choose number to start numbering from. (Default: All pages numbered. Numbering starts from 1.)
You can also customize the position and style of your page numbers. See how your changes look in the Preview section.