Rotation fixes page orientation
If a scanned PDF page is sideways or upside down, rotating the page is the right fix. You are changing how the page is displayed, not changing the image content itself.
Guide
How to rotate scanned PDF pages
Scanned PDFs often open sideways because the scan orientation was wrong when the file was created. That problem is usually easy to fix, but it is different from OCR and different from text extraction.
OCR is a separate issue
A scan can be upright and still not let you copy text. That is because scanned pages are usually images. Rotation makes them readable on screen, but it does not create a searchable text layer. That requires OCR.
When to rotate all pages
If every page in the scan is wrong by the same angle, rotate all pages at once. This is common when a phone capture or scanner feed was turned the wrong way before export.
When to rotate only some pages
If a scan bundle mixes portrait and landscape pages, rotate only the wrong pages. This often happens in combined document packets, receipts, or files assembled from several scans.
What rotation does not solve
Rotation does not crop borders, remove blank pages, merge several PDFs, or make image text selectable. For those jobs you may need Remove PDF Pages, Merge PDF, or an OCR workflow.
Related tools and guides
Use Rotate PDF to fix page orientation, then open Split PDF or Remove PDF Pages if you also need to clean up the document. For OCR context, read What OCR means for PDF text extraction.
More related guides
If you need to extract only part of a scanned file after fixing orientation, read How to extract pages from a PDF. If you are deciding between trimming and exporting subsets, read Split PDF vs Remove Pages.