Rotate PDF

Why the rotation never sticks

This is the reason people end up looking for a tool at all. You open a scanned PDF, half the pages are on their side, you hit the rotate button in your reader and it looks fine. You send it. It arrives sideways.

The rotate buttons in most PDF readers, including the one built into your browser, only change the view. They are the equivalent of tilting your head. Close the window and the setting goes with it, because nothing was ever written to the document.

This writes it in. Every page carries a rotation value as part of the file, and once that is set the page opens the right way up everywhere: your reader, somebody else's, a phone, a printer, and whatever the client opens it in.

How this tool works

A PDF page carries a rotation value that readers apply when displaying it. Rotating here changes that value and nothing else, so the page content is never redrawn and no quality is lost at all.

The turn is applied on top of whatever the page already had, which is why rotating a page that was already sideways puts it the right way up rather than back where it started. Angles are normalised into the four right angles a PDF allows, so 450 degrees is 90 and -90 is 270.

Only the pages that are wrong

The most common job here is not "turn everything". It is a document that came off a scanner or a multifunction printer where somebody fed a few sheets in the wrong way, so most pages are fine and a handful are sideways.

Turning the whole document fixes those and breaks all the others. So there is a landscape only option that finds the pages currently displaying sideways and turns just those, and a portrait equivalent for the opposite case.

That is slightly harder than it sounds, because a page's shape on screen is its dimensions and any rotation it already carries, combined. A tall page with a 90 degree flag on it displays landscape. Getting that wrong selects exactly the wrong half of the document, so it is worked out properly rather than by comparing width against height.

Or just pick the pages

Type them in if you would rather: 1-3, 5, 8-end. Commas, dashes, "end" for the last page, and a page number that does not exist is skipped rather than throwing away the rest of what you typed.

Nothing is redrawn

A rotation in a PDF is one number stored against each page. The page content is untouched.

So text stays real text and is still selectable and searchable, links keep working, vector drawings stay sharp at any zoom, and the file size barely moves. Compare that with any tool that rasterises pages to rotate them, which permanently destroys the text layer and usually makes the file several times larger.

Rotation is in right angles only

PDF only stores 0, 90, 180 or 270 degrees. There is no such thing as a page rotated by 3 degrees to straighten a wonky scan.

Fixing a slight skew is a different job called deskewing, and it does need the page to be redrawn as an image, so it belongs in scanning software rather than here. Most scanner apps and phone scanner modes do it automatically and do it better than a web page can.

Password protected files

A permissions password, which restricts printing or editing but leaves the document readable, is fine. A password needed to open it is not, because the contents are genuinely encrypted. Open it in your reader, save an unlocked copy, and rotate that.

The smallest job carries the same exposure

The file stays on your machine and is discarded when you close the tab. No upload, no size limit, no watermark, no account and nothing logged.

Rotating is the smallest thing anybody does to a PDF and it carries exactly the same exposure as the largest. A scan that came out sideways is still a scan of something, usually a signed document or a passport page, and the triviality of the job is what makes people upload it without thinking.