You take a perfectly upright photo, open it on another device, and it is lying on its side. Nothing is broken — this is an EXIF orientation quirk.
Why It Happens
Phones don't physically rotate the pixels when you turn the device. Instead they store the picture as captured and add an orientation tag ("rotate 90° when displaying"). Apps that honour the tag show it upright; apps that ignore it show the raw sideways pixels. That inconsistency is why the same file looks right in one place and wrong in another.
The Permanent Fix
The reliable cure is to bake the rotation into the pixels themselves and reset the tag. Open Rotate Image, turn the photo until it is upright, and export. The new file is genuinely rotated, so it displays correctly everywhere — email, old software, print, any browser.
Rotate, Flip and Mirror
The same tool covers three related fixes:
- Rotate 90°/180°/270° — for sideways or upside-down shots.
- Horizontal flip (mirror) — fix a selfie that reads back-to-front, or mirror a layout.
- Vertical flip — for scans or reflections that came in inverted.
About Crooked Horizons
A tilted horizon (say 3° off level) is a small rotation. Rotate to level, then use Crop Image to trim the empty triangular corners the rotation leaves behind, so you end back at a clean rectangle. As always, it all happens locally — your photos never leave the browser.