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Why is my HEIC photo sideways in the PDF? (and how to fix it)

By DeckleUpdated

If a HEIC photo is sideways or upside down in the PDF, open HEIC to PDF again, press the rotate button on that photo's row until the turn is right, and choose Create PDF again. If you would rather fix the PDF you already have, open it in Rotate PDF, choose This page, turn the page and choose Rotate PDF. Either way, your original photo is not changed.

HEIC to PDF

Choose a source for the job

Photograph

Inspect colour and detail

Diagram

Inspect lines and labels

Scan

Inspect frames and text

A static PDF page does not preserve motion

Conceptual illustration · image format and output page behaviour are separate decisions.

How to fix a sideways HEIC page

Before converting (or converting again):

  1. Open HEIC to PDF and add the photos, or drop them onto the page.
  2. Find the photo that came out wrong in Images to include.
  3. Press its rotate button. Each press turns it 90° clockwise, and the row shows the total, such as "90° clockwise" or "270° clockwise".
  4. Choose Create PDF and check that page in the download.

After converting:

  1. Open Rotate PDF and choose the PDF, or drop it onto the page.
  2. Select the sideways page and set Rotation scope to This page.
  3. Choose Turn left or Turn right until it reads correctly.
  4. Choose Rotate PDF and download the corrected copy.

Rotating in Rotate PDF does not re-compress the page, so the photo keeps its quality.

Which way to turn

The page in the PDF reads In HEIC to PDF, press rotate In Rotate PDF, choose
Bottom to top (text runs upwards) Once (90° clockwise) Turn right once
Upside down Twice (180°) Turn right twice
Top to bottom (text runs downwards) Three times (270° clockwise) Turn left once

HEIC to PDF has no page preview, so the PDF is the first place you see the final orientation. In a browser that can display HEIC, such as Safari, the row thumbnail turns with each press, which helps.

Why HEIC photos come out sideways

The phone guessed wrong when the photo was taken. This is a common cause with document photos. When you hold a phone flat above a page on a table, it has little to go on when deciding which edge is up, and it can record the wrong orientation. Your photo app then shows it sideways too. Rotating it in the photo app fixes the source for next time.

The orientation lives outside the pixels. A HEIC file can store the image in one orientation, with a separate rotation instruction saying how to display it. HEIC to PDF applies the rotation stored in the HEIC image itself. Software that records orientation some other way, for example only in the photo's camera data, can still leave a photo that looks upright in one app and sideways in the PDF. Rotate it on its row before converting.

The photo was edited or exported by another app. Apps differ in how they save a rotation. Converting the copy that looks right on your computer, exported fresh from your photo app, is the safest choice.

Check before you send

Open the downloaded PDF and look at every page at thumbnail size. Sideways pages stand out immediately in a grid of thumbnails, which is quicker than paging through. Pay attention to pages photographed flat on a desk, since those are the likeliest to be wrong.

For a long set, it can be quicker to convert everything first, then fix all the sideways pages in a single pass in Rotate PDF or in Organize PDF pages, which turns pages as well as reordering them. How to rotate a PDF and save it permanently covers both.

When rotation is not the problem

If the page is the right way up but the photo looks squashed, stretched or cut off, the cause is different. Deckle never crops or stretches images, so check the page size: with Match each image, a photo gives a very large page that some viewers shrink oddly. Fit inside A4 gives a normal page. If the file will not convert at all, see why a HEIC file is not recognised.

Tips

  • Check the photo before you leave the page. If it shows sideways on the phone, retake it or rotate it in your photo app.
  • Fix the source once. Rotating the photo in your photo library means every future conversion is right.
  • Turn the photo, not your viewer. Rotating the view in a PDF reader is not saved; Rotate PDF changes the page itself.
  • Check JPG photos too. JPG to PDF reads the camera's orientation tag and has a Preview button, so you can catch problems before converting.

Frequently asked questions

Why does the photo look upright on my phone but sideways in the PDF?

Your phone and Deckle read the photo's orientation from different places. Press the rotate button on the photo's row in HEIC to PDF and convert again.

Does rotating a page in Rotate PDF reduce quality?

No. Rotate PDF changes the page's orientation setting without touching the image.

Can I rotate all the photos at once?

In HEIC to PDF, each photo is rotated on its own row. After converting, Rotate PDF can turn all pages at once with All pages.

Will the rotation stick when someone else opens the PDF?

Yes. Both methods save the rotation in the file, so every PDF reader shows it.

Related tools

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