Transparent PNG vs JPG: which format should you use?
Choose PNG when you need the background to disappear. Choose JPG when you want a finished photo with a solid background. Here is what changes in practice.
PNG keeps the empty space
PNG can store an alpha channel: information that tells an app which pixels are transparent or partly transparent. This makes it useful for cutouts, logos, collages, and placing a product over a new design.
In BGVanish, choose Transparent and download a PNG. The checkerboard is a preview of empty space, not part of the picture. Place the downloaded PNG over a colored page to see the transparency.
JPG needs a background color
JPG does not support transparency. Every pixel needs a color. That is why simply changing a transparent PNG to JPG can introduce a white or black background, depending on the app doing the conversion.
For a predictable result, use White in BGVanish. The tool fills the background with white before saving a JPG. JPG compression often makes photo files smaller, though the exact size depends on the image.
Why a transparent PNG can look white or black
Image viewers often place transparent areas over a white, gray, or black canvas. The preview color alone does not tell you whether transparency was preserved.
Open the image in an editor and place a colored layer underneath it. If that color appears around the subject, the image is transparent. If a white rectangle stays, the image has a solid background or was converted along the way.
Choose the format for the next step
For a design that will have another background, keep a transparent PNG. For a finished product photo on white, use a white-background JPG. Keep a copy of the original so you can make new versions later.
Always check the requirements of the website or marketplace where you will publish. File format, dimensions, cropping, and background rules vary.