Rotate PDF — Free Online PDF Page Rotator

Why rotate a PDF?

Sideways and upside-down pages are one of the most common PDF problems people run into. Phone-scanned documents often arrive rotated 90° because the camera was held sideways. Some multi-function printers scan duplex pages alternating between portrait and landscape, ending up with every other page facing the wrong way. Multi-page contracts have a single landscape page in a stack of portrait ones, requiring head-tilting to read.

Fixing rotation in your PDF viewer's "View" menu only changes how the page is displayed in that session — when you re-open or print, it reverts. Permanently fixing the rotation requires re-saving the PDF with the correct orientation, which is exactly what this tool does.

How this rotator works

The tool uses pdf-lib to read your PDF, set the rotation property on the pages you select, then save the file back out. The rotation is a property in the PDF's internal structure — viewers honour it whenever the file is opened. The page content (text, images, vector graphics) is not re-rendered; the rotation is metadata that tells the viewer "display this page rotated by N degrees".

That means three things: zero quality loss, fast (no re-encoding), and small file-size change (only the rotation property changes; the rest stays identical).

90° vs. 180° vs. 270°

• 90° (clockwise) — fix pages that came in rotated to the left (top of page is on the left).
• 180° — fix upside-down pages.
• 270° (= 90° counter-clockwise) — fix pages rotated to the right (top of page is on the right).

If you're not sure which to use, try 90° first. If the page ends up upside-down, undo (reset) and try 270°.

Page range syntax

• all — rotate every page.
• 1 — just page 1.
• 1-5 — pages 1 through 5.
• 2, 4, 6, 8 — only even pages (e.g. fix every other page from a duplex scan).
• 1-3, 5 — multiple ranges.

Common rotation scenarios

• Phone-scanned documents rotated 90° because the camera was sideways.
• Duplex scans with alternating orientations — use the range field to rotate just the even pages (or odd pages, depending on your scanner).
• Receipts and invoices uploaded landscape into a portrait-only system.
• Old scanned books / journals where odd and even pages need different rotations.
• Mixed-orientation reports where one figure-page should be landscape but everything else portrait.
• Faxed documents received upside-down because the sender loaded the paper wrong.

Tips and best practice

• Test on a copy first if the PDF is irreplaceable. The tool produces a new file — your original is unchanged — but it's still good practice.
• Use the page range for mixed orientation — if pages 1, 3, 5 are correct and 2, 4, 6 are sideways, rotate just 2, 4, 6.
• For complete reversal, run twice with 90° to get 180°, or just pick 180° directly.
• For scanned documents with skewed pages (slightly off-square), rotation alone won't fix it — you need a deskewing tool. Most modern scanners auto-deskew during capture.

FAQs

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