PDF回転

A PDF rotator turns every page by 90, 180 or 270 degrees, adding to any rotation a page already has, all in your browser. It is lossless and instant.

The usual reason to reach for it is a scan or a phone capture that came out sideways or upside down, where the content is fine but the orientation makes the document awkward to read or print.

Everything runs in your browser with pdf-lib, so the file never leaves your device.

Rotation here is lossless because it only sets the display rotation flag on each page and leaves the actual content untouched. Nothing is re-rendered, so there is no loss of quality and the text stays selectable.

Because it adds to the existing rotation, you can nudge a page that is already turned, applying another 90 degrees rather than resetting, which makes it easy to get the orientation exactly right.

It rotates all pages by the same angle. To rotate only some pages, split those pages out with the split tool, rotate them, then merge them back, since rotation here applies uniformly.