Why a normal resize does not make pixel art
Shrinking an image in an editor averages the pixels together. Edges turn into soft gradients, small details turn into mud, and the result has thousands of colours. Pixel art is the opposite: every pixel is a deliberate, flat colour from a small palette, and edges are hard. This tool shrinks your image by picking the strongest colour in each block instead of averaging, then limits the palette and tidies the result.
Getting a good result
Start from an image with a clear silhouette and a plain background. Pick the width you want the sprite to be in the game, often 16, 32 or 64 pixels for characters and items. A little extra contrast and saturation helps small sprites read at a glance. Fewer colours look more like hand-made pixel art. Remove stray pixels to clear the noise, and add an outline so the sprite stands out from busy backgrounds. For a 3D model, render it with flat lighting and a strong side light, then convert, a classic way to make sprites in many directions.
Animations
Converting animation frames one by one gives each frame its own palette, so colours shimmer as it plays. With Pro, drop every frame and they are converted with one shared palette, then saved as separate PNGs and as a sprite sheet.
Is my image uploaded?
No. Everything happens in your browser.