Photos Facing the Wrong Way: EXIF vs Real Rotation
Cameras shoot sideways and write a note saying this photo should be viewed vertically. Apps that read the note show it right; apps that do not show it lying down.
Why imported photos come out sideways
When you shoot vertically, the sensor still outputs a horizontal pixel grid; the camera writes an Orientation flag (values 1-8) into the EXIF metadata describing how to display it. Gallery apps, Windows Photos, and mainstream viewers honor the flag, so everything looks correct on your device.
But the flag is metadata, not pixels. Many upload pipelines, older image libraries, and third-party apps ignore it entirely and show the raw horizontal image. That is why a photo looks fine on your phone and lands rotated after being sent somewhere else.
Manual rotation is the permanent fix
Manual rotation moves every pixel to its rotated position and outputs a photo that simply is vertical. It depends on no software reading any flag - forwarding, compression, uploads, printing, nothing can change it back.
Flag-based orientation is fragile: social platform compression and various re-encoding tools strip EXIF along the way. For anything you send, upload, or print, rotate once for real and stop worrying about which link in the chain reads flags.
Rotate, mirror, or flip
Clockwise and counterclockwise 90-degree rotations cover most cases - straightening sideways shots. 180 degrees handles upside-down captures. Horizontal mirroring fixes selfies with reversed text or documents; vertical flips are rare, mostly reflections and deliberate compositions.
Be careful with mirroring: any text, signs, or logos in frame will read backwards. Photos from the same device and grip usually share orientation - correct one, confirm the angle, then batch-apply to the rest.