Image Rotate

Photos often end up sideways or upside-down because a camera or phone records orientation as metadata rather than physically rotating the pixel grid, and not every app or website reads that metadata correctly. Rotating by a fixed 90-degree increment is a pure geometric transform — every pixel simply moves to a new position on the grid, with no interpolation or resampling of pixel values — unlike operations that resample, such as an arbitrary-angle rotation.

180-degree rotation flips an upside-down image right-side up, while 90 and 270-degree rotations swap width and height, turning a portrait photo into landscape or vice versa. The pixel positions themselves are remapped exactly rather than estimated. For a PNG or other lossless source the output stays pixel-for-pixel identical in value; for a JPG (or lossy WEBP) source, the rearranged pixels still pass through that format's own lossy encoder on the way out, so repeated rotate-and-save cycles can accumulate a small amount of generational compression loss even though no single rotation blurs or distorts anything.

Rotating by an arbitrary angle, like straightening a slightly tilted horizon by a few degrees, is a different and more complex operation: it requires interpolating pixel values along diagonal lines and typically leaves blank corners or requires cropping, which is why this tool intentionally sticks to clean 90-degree increments rather than free rotation.