Turning a whole document in one click
You pick one angle, 90, 180 or 270 degrees, and it is applied to every page of the PDF. The pages themselves are not redrawn; only their rotation setting changes.
The tool reads the current rotation of each page and adds your chosen angle to it. A page that was already turned 90 degrees and then rotated 90 more ends up at 180. The output is saved as rotated.pdf. The interface takes a single PDF (up to 200 MB) and has no thumbnails or per-page controls. Because the angle is added to whatever rotation a page already has, running the tool a second time on the output keeps turning the pages further, so start again from the original file if you picked the wrong angle. Choosing 90 turns pages clockwise, 270 counter-clockwise, and 180 flips them upside down.