When I turn a square photo by 90 degrees, should I pick expand canvas or keep the original size?
It makes no difference. A square photo such as 1080 × 1080 turned 90, 180 or 270 degrees fills its square exactly, so nothing is cut and no corners are left empty, and both options produce the same file. The choice starts to matter in two cases: when you turn by a free angle, and when the photo is not square and you choose 'Original size, clip'.
Why a square is a special case
A 90 degree turn swaps width and height. In a square they are equal, so the turned photo lands exactly in the same frame. That is why, for a square photo at a right angle, the tool shows no clipping warning and no background color option: there is nothing to cut and nothing to fill.
A 1080 × 1080 square at 90 degrees with 'Original size, clip': no clipping and no gaps, output 1080 × 1080.
The same square at 45 degrees with 'Original size, clip': the photo's four corners are cut off, and a warning says so.
The same square at 45 degrees with 'Expand to fit': output 1528 × 1528, the whole photo kept, with four triangles filled with the background color.
Compare that with a rectangular photo
This is where the difference can surprise you. A 1600 × 1200 photo turned 90 degrees:
- With 'Expand to fit': it becomes 1200 × 1600, whole, with no clipping and no gaps. This is what you want almost every time.
- With 'Original size, clip': the canvas stays a 1600 × 1200 landscape, the now portrait photo inside it is cut at the top and bottom, and empty strips are left at the sides. That is rarely intended.
That is why 'Expand to fit' is the tool's default, and the safe choice when you are unsure.
When to actually keep the original size
- When a template or platform needs fixed dimensions, you are straightening a slight tilt, and you accept losing the edges.
- When the photo is square and turned by a right angle, since, as shown, it makes no difference.
- When you want an artistic effect where a tilted photo is cropped inside a fixed frame.
Steps
- Open the Image rotator and flipper tool and choose the square photo.
- Press 'Rotate 90° right' or 'Rotate 90° left'.
- Look at the 'Output:' line: the dimensions are unchanged and there is no clipping warning.
- Download without worrying about the canvas option.
Common questions
Does the background color do anything for a square photo turned 90?
No, there are no gaps to fill. Unless the photo has transparency and you save as JPEG, in which case the transparent areas are filled with it.
Does a 90 degree turn lose quality?
The pixels move as they are. The only loss comes from saving as JPEG or WebP at quality 92; PNG is lossless.
What about 180 degrees on a rectangular photo?
180 does not swap width and height, so both options give the same result with any photo.