Why does the page look fixed in my viewer but print sideways?

Two different mechanisms are involved. The rotate button in most viewers is a display setting — it never touches the file, so printing uses the original orientation. Saved rotation is also stored as a per-page property that a few older printers and stripped-down previews handle inconsistently. PDFTasker writes the rotation into the page itself so standard software renders it the same way, but the safe habit stands: check print preview before committing a stack of paper.

Can I fix a page that is only slightly tilted?

No. Rotation works in quarter turns — 90, 180, or 270 degrees — so it corrects sideways and upside-down pages, not a four-degree tilt from a crooked scan. A skewed page needs re-scanning, straightening in image software before conversion, or cropping the worst of the slant away with the crop tool. If the text reads fine, many recipients will never notice a slight tilt; re-shoot only when the document matters.

Do I have to rotate the whole document at once?

No. Each page is rotated independently, which matches the common real case — one landscape exhibit inside a portrait contract, or three sideways pages in a sixty-page scan. Turn only the pages that need it and leave the rest untouched. A landscape table that is meant to be read sideways can stay landscape; rotate it only if the recipient will print single-sided and read the document like a book.

Rotate PDF pages so they stay rotated

The rotate button in most PDF viewers changes how the page looks on your screen and nothing else: close the file and the page is sideways again; send it and your recipient gets the original orientation. That is view rotation. What a sideways scan actually needs is page rotation — the orientation written into the file itself, so every compliant viewer and printer renders it upright. PDFTasker's rotate tool does the second kind, in your browser. Sideways pages usually arrive in batches: a sheet feeder fed a landscape exhibit through a portrait scan job, a phone scan recorded the wrong orientation, or a merge combined documents that disagree. The fix is quarter-turn increments per page, applied to exactly the pages that need it — an upside-down page takes two clicks, not one. Rotation here is lossless: the tool updates each page's orientation value without re-rendering content, so text stays selectable, images keep their resolution, and the file size barely moves. And because the whole job runs locally, a sixty-page scan costs nothing to fix, export, re-check, and export again. One habit prevents most rework: after exporting, scroll the thumbnails once before you send the file anywhere.

How-to guides

Step-by-step guides

01
Load the PDF
Open the rotate tool and drag in the file. Page thumbnails render locally in your browser — nothing is uploaded.
02
Find the pages that need turning
Scroll the thumbnails once. Sideways and upside-down pages stand out, and scans tend to fail in runs rather than at random.
03
Rotate in quarter turns
Turn each affected page 90 degrees at a time. An upside-down page needs two turns; the thumbnail shows the live result.
04
Export and verify
Download the corrected PDF and scroll it once more. The rotation is written into the file, so it opens upright everywhere.

Frequently asked questions

Why does the page look fixed in my viewer but print sideways?: Two different mechanisms are involved. The rotate button in most viewers is a display setting — it never touches the file, so printing uses the original orientation. Saved rotation is also stored as a per-page property that a few older printers and stripped-down previews handle inconsistently. PDFTasker writes the rotation into the page itself so standard software renders it the same way, but the safe habit stands: check print preview before committing a stack of paper.
Can I fix a page that is only slightly tilted?: No. Rotation works in quarter turns — 90, 180, or 270 degrees — so it corrects sideways and upside-down pages, not a four-degree tilt from a crooked scan. A skewed page needs re-scanning, straightening in image software before conversion, or cropping the worst of the slant away with the crop tool. If the text reads fine, many recipients will never notice a slight tilt; re-shoot only when the document matters.
Do I have to rotate the whole document at once?: No. Each page is rotated independently, which matches the common real case — one landscape exhibit inside a portrait contract, or three sideways pages in a sixty-page scan. Turn only the pages that need it and leave the rest untouched. A landscape table that is meant to be read sideways can stay landscape; rotate it only if the recipient will print single-sided and read the document like a book.