Rotate PDF and watch it turn

You can see it happen

Half a scanned stack comes out sideways and the other half does not, which is why rotating a PDF is really a job of finding the wrong ones. Docqify lays every page out as a picture and turns it on screen the instant you press the button, so you are looking at the result rather than guessing at it. Nothing is written to the file until you save, so you can turn a page four times, change your mind, and undo the lot without having touched the original.

• Rotation is stored as an instruction in the PDF, not by redrawing anything, so a rotated file is exactly as sharp as it was and barely changes size.
• Every page starts selected, because a scan that came out sideways usually came out sideways throughout. Deselect the ones that were already right.
• Pages that already carry a rotation are turned relative to it, so a page lying at 270 degrees and turned right lands upright rather than somewhere new.
• Everything runs on your device. The page ships a Content Security Policy that blocks connections to any other origin, so a document you rotate here cannot be sent anywhere.