Drop the image with the white background; get a transparent PNG.
The AI finds the main subject rather than just deleting white pixels, so white parts inside your subject (a white shirt, a white mug) stay put.
For flat graphics with lots of fine text, check the preview: very thin lines can be softened.
No. It segments the subject, so white areas that are part of the subject are kept.
No. The AI model runs inside your browser (WebGPU when available, otherwise WebAssembly). Your images are read and processed on your device and never sent to us or anyone else. Open your browser's network tab and check.
The first time, your browser downloads the AI model (about 45 MB, or 115 MB on WebGPU) from the Hugging Face CDN and caches it. After that it starts in a few seconds.