It is a free online background eraser that turns any photo into a clean cut-out. You upload a picture, the tool separates the foreground subject from everything behind it, and you download a transparent PNG.
Under the hood it runs subject segmentation: the image is split into foreground and background, the edge around the subject is refined down to hair and fine outlines, and the removed area is written to the alpha channel so it reads as fully transparent. You can feed it PNG, JPG, or WEBP files.
When you want to do more than erase, the cut-out passes straight to the Change Background tool, where you can drop in a solid color, a blur, your own backdrop, or an AI scene.