How to use Flip Image
Mirror an image horizontally (left–right) or vertically (top–bottom) entirely in your browser. Flipping rearranges pixels on a canvas without re-compressing the image, so there is zero quality loss. Useful for correcting selfies, mirroring diagrams, creating symmetrical compositions, or fixing incorrectly oriented scans.
- Upload your image by clicking the drop zone or dragging a file onto it.
- Choose to flip horizontally (mirror left–right), vertically (top–bottom), or both.
- See the live canvas preview update instantly as you toggle the flip options.
- Click "Download Flipped Image" to save the result as a PNG.
Your data never leaves your device — 100% private processing.
Horizontal vs. vertical flip: when to use each
A horizontal flip mirrors an image along the vertical axis — the left side becomes the right side. This is the most common transformation, used to create mirror images of portraits, correct selfie photos (cameras often mirror the preview but save the un-mirrored version), and produce symmetrical graphics. A vertical flip mirrors along the horizontal axis — the top becomes the bottom — useful for creating reflection effects, flipping upside-down scans, and generating water-reflection-style composites. Applying both transformations simultaneously is equivalent to a 180° rotation.
| Transform | Axis | Common use cases |
|---|---|---|
| Horizontal flip | Vertical (left↔right) | Selfie correction, mirror text, symmetry |
| Vertical flip | Horizontal (top↔bottom) | Reflection effects, upside-down scans |
| Both flips | Both axes | Equivalent to 180° rotation |
Canvas-based pixel mirroring: how it works
Image flipping is implemented using the Canvas 2D API transform. For a horizontal flip, the canvas context is translated by the canvas width along the X axis, then scaled by −1 on the X axis — this maps pixel x to (width − x). For a vertical flip, the same technique applies to the Y axis. The drawImage call then renders the source image into the transformed coordinate space. Because no re-encoding occurs, the output retains the full colour depth and sharpness of the original. The result is exported as a PNG to preserve any transparency.
Glossary
- Horizontal flip
- Mirroring an image so the left side becomes the right side, as if viewed in a mirror.
- Vertical flip
- Mirroring an image so the top becomes the bottom, creating an upside-down version.
- Canvas transform
- A 2D matrix operation applied to the drawing context that translates, scales, or rotates all subsequent draw calls.
- Lossless transform
- An image operation that rearranges or reorders pixel data without discarding information or re-compressing.
Related reading
Frequently Asked Questions
Why use Flip Image?
- Horizontal flip corrects the mirror orientation that front-facing cameras apply to selfies
- Lossless canvas transform preserves full image quality with no re-compression artefacts
- Instant live preview updates before download so orientation is confirmed visually
- Vertical flip enables water-reflection composites by inverting the image top-to-bottom
Common use cases
- Fix a selfie that appears laterally reversed compared to your own mirror reflection
- Flip a diagram horizontally so directional arrows point in the correct reading direction
- Mirror a product label scan to produce the correct readable orientation for a brochure
- Create a vertical reflection of a lake scene to use as an overlay in a composite image
- Correct an upside-down scanned page by flipping it vertically before OCR processing
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