The Four Basic Operations
Image Converter provides four fundamental rotate/flip operations:
- Rotate left 90°: Turn a portrait image into landscape.
- Rotate right 90°: Turn a landscape image into portrait.
- 180°: Flip the image completely upside down.
- Horizontal flip: Mirror left and right.
- Vertical flip: Mirror up and down.
Sounds simple, but knowing when to use which trips many people up.
Rotation: 90° Steps
90° Rotation
90° rotation is the most common operation. Scenarios include:
- Landscape-mode video frames captured on a phone: The orientation is wrong and needs to be rotated.
- Scanned documents facing the wrong way: The scanner was placed incorrectly, so the resulting file is reversed.
- Combining photos with different orientations: Unify the orientation before stitching.
90° rotation is lossless — pixels are rearranged but no information is lost.
180° Rotation
Two 90° rotations, or a single 180° rotation. Scenarios include:
- An image that's flipped upside down: For example, a photo rotated 180° by mistake.
- Stitching multiple images when one faces the wrong way: Unify the orientation.
180° is also lossless.
Flipping: Horizontal and Vertical
Horizontal Flip (Left-Right Mirror)
- Selfie mirror correction: Some phones mirror selfies automatically, so what the subject sees is reversed from reality.
- Reversing mirrored text: Photos of mirrors, screens, or reflective surfaces.
- Design effects: Mirror compositions, previewing left-right symmetric layouts.
Vertical Flip (Up-Down Mirror)
- Negative effect: Simulating traditional film negatives.
- Mirror composition: Previewing a water-reflection look.
- Special design needs: Previewing top-bottom symmetry for posters or packaging.
EXIF Rotation: The Easiest Trap to Fall Into
Many phones (especially iPhones) only write a rotation tag into the photo's metadata instead of actually rotating the pixels.
That means:
- It looks correct in the photo library.
- It opens at the wrong angle in some apps.
- It uploads at the wrong angle to some platforms.
Image Converter reads the EXIF Orientation tag and truly rotates the pixels before exporting. The saved image opens in the correct orientation anywhere.
Rotate or Flip: Scenario Reference
| Symptom | Action | Why |
|---|---|---|
| Landscape video frame is portrait | 90° rotation | Video orientation doesn't match display orientation. |
| Selfie left-right is reversed | Horizontal flip | The phone mirrored it automatically. |
| Scanned document faces the wrong way | 90° rotation | The scanner was placed incorrectly. |
| Mirrored text in a reflection | Horizontal flip | Mirror imaging. |
| Whole photo is upside down | 180° rotation | The phone was held the wrong way. |
| Inverted water reflection | Vertical flip | Simulate a reflection effect. |
If it's just an EXIF tag issue, there's nothing to do — Image Converter handles it automatically during conversion.