How to rotate
Drop in a PDF. Use Rotate all to turn every page, or click a single page to turn just that one a quarter turn at a time. Press Save PDF and download it.
A real rotation
The turn is saved into the PDF itself, so it stays the right way up in every viewer and when printed. The pages are not redrawn, so nothing loses quality.
Questions
Is my PDF uploaded?
No. It is rotated in this page, on your device.
Can I also reorder pages?
Yes, with Organize PDF, which turns, moves and deletes pages.