Sprite UV Mapper

Sprite UV Mapper

Upload an image containing multiple sprites (e.g. 10 character sprites). Enter how many objects the image contains. The tool scans the image for opaque pixels, finds connected regions, and computes a bounding box for each. From that you get normalized UV coordinates (0–1) for use in shaders or 3D engines.

How it works

• Alpha threshold: Pixels with alpha above this value are considered “solid”. Lower values include more semi-transparent pixels.
• Min area: Regions smaller than this (in pixels²) are ignored so noise or small artifacts don’t become sprites.
• Order: Detected sprites are sorted bottom-to-top, then left-to-right, and numbered 0 to N−1.