Flip Image

Why selfies come out mirrored — or don't

The front camera preview on a phone behaves like a mirror, because that is what people expect when they look at themselves: raise your right hand and the hand on the right of the screen goes up. What gets saved is a separate decision, and phone makers do not agree on it.

iPhones save the unmirrored image by default, which is how other people see you, so the photo looks reversed compared with the preview you composed it in. There is a setting, Settings → Camera → Mirror Front Camera, that saves the mirrored version instead. Android phones vary by maker and camera app; many have a "Save selfies as previewed" or "Mirror front camera" switch buried in the camera's settings. Video calls add another layer, because most apps show you mirrored while sending the unmirrored picture to everyone else.

Neither version is wrong — they are two true pictures of the same face. But if the photo contains writing, a logo on clothing, or a street sign, only the unmirrored version reads correctly, and that is the usual reason to flip one back.

Why your own face looks odd the other way round

Most people prefer their mirror image, and their friends prefer the unmirrored one. This was measured in a 1977 study by Mita, Dermer and Knight, who showed people photographs of themselves in both orientations: subjects tended to prefer the mirrored print, which matches the face they see every day, while their friends tended to prefer the true print, which matches the face they see. It is a straightforward familiarity effect, and it explains why a perfectly good photo of you can feel subtly wrong.

So for a profile picture, flipping to the version you like is entirely reasonable. For anything with text or a recognisable place in the background, flip it the other way so the world reads correctly.

Horizontal, vertical, and the difference from rotating

Flip horizontal swaps left and right, as if the picture were reflected in a mirror standing beside it. This is the one people mean by "mirror an image".

Flip vertical swaps top and bottom, as if reflected in a pond. It is not the same as turning the picture upside-down: an upside-down photo has also swapped left and right. Flipping both horizontally and vertically is mathematically identical to rotating by 180°, and the page treats them as the same transform.

A useful check: text that has been flipped horizontally reads backwards; text flipped vertically reads upside-down and backwards in a way no rotation can fix; text rotated 180° reads normally once you turn your head — or the page.

Other jobs a flip is for

Iron-on and sublimation transfers are printed mirrored, because the design is pressed face-down onto the fabric. Most transfer paper instructions say to flip the image horizontally before printing; if your printer driver has no mirror option, flip the file here and print it as normal. The same goes for window decals applied to the inside of glass and for some laser-engraving and screen-printing workflows.

In layout and design, direction carries meaning. A person or vehicle in a photo usually looks better facing into the page rather than out of it, so designers routinely flip a stock photo to point towards the text. Check first that nothing in the frame gives the game away: writing, wristwatches, buttons on clothing (which conventionally sit on different sides for men's and women's garments), steering wheels and the side of the road traffic drives on.

Scanned film negatives and slides are another case. A strip scanned emulsion-side up comes out mirrored; a horizontal flip restores it.

Quality, formats and batches

A flip moves every pixel to its mirrored position without changing its value, so there is no resampling and no softening. The only quality consideration is the file format: PNG output is lossless, while a JPEG is compressed again when it is saved, at the quality you set (92 by default, which is visually lossless for photographs). Choose PNG for screenshots and graphics with text.

Each image in a batch keeps its own settings, so you can flip some and leave others; Use these settings for all applies the current image's flip and rotation to every file. If a photo is also sideways, combine a flip with a quarter turn in the same pass — the result is saved once, upright and mirrored, with the orientation baked into the pixels.

Saving re-encodes the file, which removes its EXIF metadata, including camera details and GPS location. The image itself never leaves your device.