Mac's Preview can rotate PDFs but the change is sometimes lost when re-opening or sharing the file. Here is how to permanently rotate PDF pages on Mac using a free browser tool that writes the rotation directly into the file.
When you rotate a page in Preview and save, the rotation is usually stored as metadata. Some apps and printers read this metadata differently, causing the page to appear in the wrong orientation. A reliable fix writes the rotation into the PDF page content itself.
On your Mac, open Safari or Chrome and go to pdfeditor.onl/rotate-pdf. No installation is needed.
Drag your PDF from Finder into the browser tool, or click to browse for it. All pages appear as thumbnails showing their current orientation.
Click the rotate-left or rotate-right button on any page thumbnail. You can rotate individual pages or all pages at once. The thumbnail updates to preview the new orientation.
Tip: Use Rotate All to fix an entire document scanned sideways. Use individual rotation to fix just a few landscape pages in an otherwise portrait document.
Click Download PDF. The file saves to your Mac Downloads folder with rotations permanently applied. The rotation is written into the PDF page structure — not just metadata — so it looks correct in every app.
Some tools save rotation as viewer metadata rather than embedding it in the page. Use pdfeditor.onl to save a rotation that is embedded in the file and shows correctly everywhere.
Yes. Click the rotate button only on the page(s) you want to change. All other pages stay in their original orientation.