Check whether the file or the preview is rotated
Open the image outside the upload form. If it is sideways there too, correct the saved copy before trying again. If it looks upright in one viewer but sideways in another, the applications may be interpreting the image’s orientation information differently.
Do not keep uploading different thumbnails without checking which file they represent. Make a separate working copy with a clear name and use that for the correction. It is much easier to diagnose one known file than a gallery of near-identical exports.
Rotate the image and save a new copy
Use an image editor’s rotate command to turn the photograph by the required quarter-turn, then export a new image. Apple’s Preview includes rotation controls. Reopen the exported copy to confirm that the saved result, rather than only the current editing view, is upright.
A rotation and a horizontal flip are different operations. A flip mirrors left and right, changing the position of asymmetrical features. Do not use it to correct a sideways image. The goal is an upright version of the same photograph, not a mirrored portrait.
Recheck width and height after the change
Rotating a rectangular image exchanges which side is the width and which is the height. A 900 × 1200 portrait should not become an intended landscape output simply because it was exported from a rotated preview. Read the final dimensions after saving.
If the application wants a wider original for its own crop tool, preserve that content. Do not combine an orientation fix with a much tighter crop unless the route calls for it. Keeping those operations separate helps you spot the cause if another error appears.
Upload and inspect the actual preview
Choose the new file by name and wait for the form to display it. Check that the eyes, head and shoulders are upright and that the person is not mirrored. If an old preview remains, clear the selected image through the form’s controls before choosing the new copy.
If a fresh export still displays incorrectly, record the file type and the exact behavior and contact the application’s support service. Avoid repeatedly changing the portrait itself to compensate for a malfunctioning preview. The saved image should remain a faithful, usable photograph.
Sources and further reading
Apple Support · Crop, resize or rotate an image in Preview ↗Requirements can change. Check the official instructions for your application before submitting.
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