The format you export decides whether your cutout keeps its transparency and how heavy the file is.
PNG
Lossless and the only common format with a real alpha channel. Use PNG whenever the background must stay transparent — logos, product cutouts destined for a coloured page, overlays.
JPEG
No transparency at all. A transparent area is flattened, usually to white or black. Use JPEG only after you have replaced the background with a solid colour, gradient or photo.
WebP
Supports transparency and compresses far smaller than PNG. Excellent for the web; less universally supported by older desktop software.
The simple rule
- Transparent background needed → PNG
- Web performance matters and transparency is needed → WebP
- Flat background already applied and you want the smallest file → JPEG
Step-by-step instructions live in the export guide