Add Page Numbers reads each page's stored rotation angle from the PDF itself before placing the label.
Adobe's own guide to rotating PDFs confirms that once a rotated PDF is saved, the pages keep that stored orientation every time the file is reopened. Learn how to rotate PDF files on a PC
Add Page NumbersPage Number Wrong Position Rotated PDF
For a page rotated 90 or 270 degrees, the placement function swaps the x and y coordinates using the page width and height so the label still reads correctly for that orientation.
For a page rotated 180 degrees, the same function flips both the x and y coordinates using the page width and height so the label moves to the opposite corner instead of landing upside down.
Upload the file to begin the page-numbering process.
Select the bottom-right corner for the label placement.
Checking Labels on Landscape Pages
Open the downloaded PDF and scroll to a rotated page.
Confirm the number reads correctly in the bottom-right corner.
Continue with Batch multiple PDFs or Change font size.
Frequently Asked Questions about Fix Page Number Position on Rotated PDFs
How do I start adding numbers to a rotated PDF?
Add the file through the standard upload step regardless of its stored rotation.
Where do I choose the label position?
Pick a corner or center position from the placement options before processing.
How do I verify the number is readable?
Zoom into a rotated page to check the label sits right-side up.
Where do I check the final alignment?
Inspect the bottom-right corner of a landscape page after downloading.