Rotate or delete PDF pages

Scanners are the usual culprit: automatic orientation detection misreads one page in a stack of fifty, and the result is a document where every third page lies on its side. Phone-scanning apps cause a similar problem by storing the camera's orientation as a rotation flag that some readers honor and others ignore — your file looks fine in your viewer and sideways in the recipient's.

Select the affected pages in the thumbnail grid and rotate in 90-degree steps until orientation is correct. Click again for 180° or 270°. The rotation is written into the page definitions, so every PDF reader renders the same result — and because only orientation changes, text stays vector-crisp and file size is unaffected. Work from the thumbnails rather than memory: it is easy to over-rotate one page while fixing another, and the visual grid exposes that before you export.

Scanned stacks accumulate pages that should not ship: blank separator sheets, staple shadows, upside-down covers, and the "page intentionally left blank" notices printed into contracts. Mark them for deletion in the same pass as your rotation work — both actions apply in one step, so cleanup is a single operation rather than two round trips.

Before deleting, check whether the page carries anything structural: a table of contents entry pointing at it, a signature page disguised as a form, or a numbered exhibit that other pages reference. Page numbers in the remaining document will not renumber themselves, so documents with printed folios should have those checked after removal.

Not every sideways page is an error. Reports that pair portrait text with landscape data sheets are working as designed, and forcing uniform orientation can make tables illegibly small. The test is whether a reader could consume the document linearly without rotating their device — if pages flip direction for no content reason, fix them; if a wide table genuinely needs the width, leave it.

Print changes the calculation: a landscape page forced onto portrait paper scales down to fit and often becomes unreadable. For documents bound for paper, pre-rotate landscape pages to portrait or print those sections as their own run — a one-page test print is cheaper than a ruined batch.

PDF stores orientation as a flag on each page rather than as redrawn pixels. This tool writes that flag — the same mechanism used by mainstream PDF producers — which is why the operation is instant, lossless, and independent of file size: no page content is touched, nothing is re-encoded, and the text layer remains exactly as it was. A rotated page is still the original page, pointing a different way.

The reason this fixes "sideways for some people" is that the fix now lives in the file itself instead of in one viewer's preferences. When a recipient's reader previously ignored the sender's view setting, the written flag gives it explicit instructions. For total confidence, verify the result in a second reader after exporting — two independent renderers agreeing means the file is correct, and any later disagreement indicates that reader's preview layer rather than your document.

Orientation problems rarely arrive alone — a scanned packet also has blank pages to delete, pages from other sources to merge in, and eventual OCR or distribution. Fixing rotation first keeps every later step honest: OCR engines read pixels assuming upright text, so a pre-OCR rotation pass is what makes search work; thumbnails and previews for recipients render correctly the moment the file lands; and merged fragments assembled from rotated and unrotated sources behave consistently.

A practical order for the whole cleanup: rotate and delete in one pass over the thumbnail grid (both actions apply together, so a scan is tidied in a single export), verify the grid visually — wrong orientations announce themselves against their neighbors — then merge with other documents or split into the pieces you distribute. Doing orientation last means redoing downstream previews; doing it first means everything after inherits a correct document.