How to rotate a PDF and save it
Open Rotate PDF, pick the angle, tap the pages to turn or leave them all, then download.
Which angle do I need?
Sideways pages need 90 or 270 degrees. Upside-down pages need 180. If you pick wrong, run the file through again.
Why your viewer's rotate isn't enough
Many viewers only change the view and don't save it. This tool writes the angle into the file.