How to rotate pages in a PDF
Scanned sideways, or a landscape page in a portrait document. Rotating in your viewer does not save it — this does.
Most PDF readers let you rotate the view, and that rotation is not written to the file. Reopen it, or send it to somebody, and the page is sideways again. Saving the rotation means changing the document.
Step-by-step
- Add your PDF. It is read in your browser; nothing is uploaded.
- Select the pages to rotate, or all of them.
- Choose the direction — 90° clockwise, 90° anticlockwise, or 180°.
- Apply and download.
Rotating some pages, not all
Scans commonly have a few pages the wrong way — a landscape table in a portrait report, or a batch fed in sideways. Select just those. Applying a rotation to every page to fix three of them creates twenty new problems.
Why the text still selects correctly afterwards
Rotation here sets each page's rotation property rather than re-rendering the page as a picture. The text stays text, so it remains searchable and selectable, and the file does not grow. Tools that flatten pages to images to rotate them destroy both properties, and the result is a much larger file you can no longer search.
Rotating is not deskewing
These get conflated and they are different operations with different costs. Rotation turns a page by a quarter turn, and it is free and lossless — nothing about the page content is recomputed. Deskew corrects a page that went through the scanner at two or three degrees off straight, and it cannot be done that way: every pixel has to be resampled onto a new grid, which softens the image slightly and, on a scan, is irreversible.
So a page that is sideways wants rotation, and a page that is merely crooked wants a different tool and a decision about whether the improvement is worth the resampling. A page that is both wants rotating first, because it is the free operation and it makes the remaining angle obvious.
When a viewer ignores the rotation
Occasionally a rotated PDF looks correct in one application and wrong in another, or prints in the original orientation. This is because rotation is recorded as a property of the page rather than baked into its contents, and the reader is expected to honour it when rendering — which is exactly what makes the operation lossless, and what lets the text stay selectable in the right order afterwards.
Almost everything honours it. The exceptions tend to be older printer drivers, some print-shop workflows, and tools that extract page content directly without consulting the page attributes. If a file has to survive an unknown pipeline, it is worth checking how it prints as well as how it looks, and worth sending a test page before committing a long document to an unfamiliar printer.
Frequently asked questions
Does rotating reduce quality?
No. The page's rotation property is changed and the content is untouched, so text stays text and nothing is re-compressed.
Can I rotate just one page?
Yes. Select the pages you want and leave the rest alone.
Why does my viewer show it correctly but the recipient's does not?
You probably rotated the view rather than the file. A view rotation is not saved into the document; this tool changes the document itself.
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