Overview
Introduction
This tool flips a PNG image left-to-right, entirely client-side, reversing the pixel order within every row.
It's the horizontal counterpart to the vertical flipper tool and one of the simplest, fastest PNG transforms available here.
What Is PNG Horizontally Flipper?
A client-side PNG flipper that reads an uploaded image's pixel data and writes each pixel to its mirrored X position, producing a left-right reversed copy the same size as the source.
Unlike rotation or skewing, flipping never changes the canvas dimensions and requires no interpolation, so results are always pixel-perfect.
How PNG Horizontally Flipper Works
For every pixel at position (x, y), the tool copies its color directly to position (width - 1 - x, y) in the output, effectively reversing the horizontal order of pixels in each row while keeping rows in the same vertical position.
Because every output pixel maps to exactly one input pixel, there's no sampling or blending involved.
When To Use PNG Horizontally Flipper
Use it to mirror a character sprite facing the opposite direction, correct a selfie-camera mirrored photo, or create a symmetric design pair from a single asset.
It's also a common step before or after other transforms like rotation when preparing a full set of orientation variants.
Often used alongside PNG Vertically Flipper and PNG Mirrorer.
Features
Advantages
- Runs entirely client-side; the uploaded image is never sent to a server.
- Pixel-perfect result with zero interpolation or quality loss.
- Extremely fast, since every pixel maps 1:1 with no sampling math.
Limitations
- Any text or inherently asymmetric detail in the image will appear mirrored/backwards after flipping.
- Flipping twice returns the exact original image, so it's not useful for creating multiple distinct variants on its own.
Examples
Best Practices & Notes
Best Practices
- Check for any text or logos in the image before flipping — they'll come out backwards and may need a separate corrected asset.
- Combine with the vertical flipper for a full 180-degree point reflection (equivalent to a 180° rotation).
Developer Notes
flipPngHorizontally is a pure lib function operating on a plain Uint8ClampedArray PixelBuffer: it allocates a new buffer of the same dimensions and copies each pixel to its horizontally mirrored position in a single pass — no DOM access until the component paints the result for preview/download.
PNG Horizontally Flipper Use Cases
- Creating a mirrored variant of a character sprite
- Correcting a mirrored front-camera photo
- Building a symmetric pair of design assets from one source image
Common Mistakes
- Flipping an image that contains readable text or asymmetric branding, not realizing it will come out mirrored/backwards.
- Expecting the flip to change the image's dimensions — width and height always stay the same.
Tips
- Combine horizontal and vertical flips for a full point-symmetric flip, equivalent to a 180-degree rotation.
- Use the mirrorer tool instead if you want a symmetric result derived from just one half of the image.