Mirror an Image Horizontally or Flip It Vertically
Reverse a picture along either axis, or both at once, without changing its dimensions.
About the Image Flipper
Two independent checkboxes drive this tool. Flip horizontally produces a mirror image and is ticked by default, because mirroring is by far the more common need. Flip vertically turns the picture upside down. Ticking both applies each in turn, which is the equivalent of a half turn. Leave both unticked and the tool stops with a message rather than handing you back an unchanged file.
Unlike rotating at an angle, flipping never changes the canvas size — the same pixels are drawn in reverse order along one axis, so the output has exactly the width and height it started with and no empty corners appear. Output format can be left matching the input or set to PNG, JPG or WebP, and a batch of images can be flipped together. The transformation runs locally, which keeps client artwork out of anyone else's hands.
Key Features
- Two axes, independently: Horizontal and vertical are separate checkboxes, so you can apply either or both in one pass.
- Dimensions never change: Flipping reorders pixels along an axis, so width and height are identical to the source and no padding appears.
- Mirror on by default: Horizontal flip is preselected because mirroring is the usual reason people open this tool.
- Refuses a no-op: With neither box ticked the tool tells you to pick a direction instead of returning an identical file.
- Batch and format control: Flip a set of images at once and export as PNG, JPG or WebP with a quality setting.
How to Use the Image Flipper
- Add the images you want to flip.
- Tick horizontal for a mirror image, vertical to turn it upside down, or both.
- Choose an output format if the input format is not what you need.
- Flip and download the results.
How It Works
The flip is performed by translating the canvas origin and applying a negative scale factor on the chosen axis before drawing the source image, which reverses it without resampling. Because no interpolation happens, a horizontal flip is geometrically lossless — the only quality consideration is the format you export to, so choosing PNG preserves the pixels exactly while JPG re-compresses them. Both flips can be combined in a single draw operation, and the output keeps the source dimensions in every case.
When You Need It
A small garment printing business has to mirror every design before it goes to a heat-transfer press, because the artwork is applied face down and would otherwise come out reversed on the shirt. The files are customers' licensed artwork, and uploading a client's copyrighted design to a free image site to perform a ten-second operation is a poor way to treat work you were entrusted with. Vinyl cutters preparing window graphics and embroiderers reversing motifs mirror their files for identical production reasons.