Drop in a PDF, pick a direction, and download it with the pages the right way up. You can turn the whole document or name specific pages, which is what you usually want after a scanner has fed half a stack in sideways.
The important part is that the rotation is saved into the file. Turning a page with the view controls in Acrobat or Preview only changes how it looks on your screen — send that file to someone else and it arrives sideways again. This writes the rotation into the document, so it travels with it.
Rotation in PDF is a property of the page rather than the pixels, so this is an instant, lossless edit. Nothing is re-rendered and the file size does not change by more than a few bytes.
How to rotate PDF
- Add your PDFs. Up to 20 files at once, 100 MB each. Every file gets the same rotation, which is what you want for a batch off one scanner.
- Pick a direction. 90 degrees clockwise, 180 for upside-down pages, or 90 anticlockwise.
- Choose the pages. Leave the page box empty to turn everything, or enter ranges like 2, 5-9 to fix only the pages that are wrong.
- Rotate and download. The rotation is written into the file, so it stays correct wherever the document is opened next.
Why a rotated page turns back on its own
Almost every PDF reader has two different rotations. One is a view setting that lives in the application and is thrown away when you close the file. The other is the page’s own /Rotate property, stored in the document itself.
Most people reach for the toolbar button, which does the first one. The page looks right, they save, and it still looks right on their machine — because the reader remembers. Then they email it and the recipient sees it sideways, because the document never changed. This tool always writes the second kind.
It also adds to any rotation already there rather than replacing it. A page stored at 90 degrees that you rotate by another 90 ends up at 180, not back at 90 — which is what you expect when you are turning a page that is already partly wrong.
Rotating only some pages
Leave the page field blank and every page turns. That is right for a document scanned entirely in landscape, and wrong for the common case where a few pages went through the feeder the wrong way.
For those, list the pages that need fixing: 2, 5-9, 14. Work out the numbers from the document’s own page order, counting from one — not from any numbering printed on the page, which may start elsewhere.
If different pages need different directions, run the tool twice. Rotate the clockwise ones first, download, then put that file back in and fix the rest. Because rotation is lossless there is no penalty for doing it in two passes.
Limits worth knowing
Only right angles. PDF stores rotation as 0, 90, 180 or 270 degrees and readers reject anything else. A page scanned at a slight skew cannot be straightened here — that needs the page re-rendered, which is what the deskew step in OCR PDF does.
Rotation does not change the page size. Turning an A4 portrait page 90 degrees gives you an A4 page displayed in landscape, not a different paper size. Printers handle this correctly; some older software does not and prints it cropped.
Text stays selectable and searchable. Because nothing is re-rendered, the text layer is untouched. A rotated page copies and searches exactly as it did before.
Questions people actually ask
Why does my PDF keep opening sideways after I rotate it?
Because the rotate button in most readers changes a view setting rather than the document. Your machine remembers the setting, so the file looks correct to you and sideways to everyone else. Rotating here writes the change into the PDF itself, which is why it survives being emailed, uploaded or printed elsewhere.
Can I rotate only certain pages?
Yes. Enter the page numbers in the pages field — for example 2, 5-9, 14. Everything you do not list is left alone. Leave the field empty and every page in the document is rotated instead. Count from the start of the document rather than from any page numbers printed on the pages, which often begin somewhere else.
Does rotating a PDF reduce its quality?
No. Rotation is a property recorded against the page, not a change to its contents, so nothing is re-rendered or re-compressed. The file you download is the same size as the one you uploaded, give or take a few bytes, and the text stays fully selectable.
Can I straighten a page that is slightly crooked?
Not with this tool. PDF only supports rotation in 90-degree steps, so a scan that came out a few degrees off cannot be corrected by rotating. Straightening a skewed scan means re-rendering the page, which is what the deskew option in OCR PDF does.
What happens if I rotate a page that is already rotated?
The rotations add together. A page already stored at 90 degrees, rotated another 90, ends up at 180. This is deliberate — if it replaced the existing value instead, fixing a batch where pages are wrong in different ways would be impossible.