A photo that appeared upright on your phone and sideways everywhere else is a common and slightly maddening problem with a simple explanation.
Cameras often save the image in one orientation and add a note saying which way up it should be displayed. Software that reads the note shows it correctly. Software that ignores it shows the raw image, which is sideways.
That is why the same file can look fine in your gallery and wrong once uploaded to a form or opened on a different computer. Nothing changed about the photo, only whether the note was honoured.
The export rewrites the pixels in the selected orientation rather than relying on the original rotation note. Reopen the saved copy in the destination software to confirm it displays as intended, and retain the original.
Turn left and Turn right rotate the picture a quarter turn each time, and the pixels themselves are turned. That is why the result looks right everywhere, unlike a photo that only carries a note telling a viewer to turn it.
Crop & rotate also lets you flip the picture, and a crop box is optional. Press Turn twice for a half turn. The saved picture keeps the format of the original, with PNG and WebP staying as they are and other types saved as JPG.
The site is ignoring the orientation note your camera saved. Rotating and saving the file removes the ambiguity.
JPG and WebP are encoded again when saved, which can change detail. There is no small-angle rotation control.
No.
Press Turn left or Turn right twice. Two quarter turns make a half turn.