Convert a transparent PNG to JPG

Logos, signatures and cut-out product shots are often PNGs with transparent backgrounds. Some uploads only accept JPG, and JPG has no transparency.

PNG to JPG fills transparent areas with plain white before encoding, so the result looks clean on white pages instead of showing a black or checkered background.

Example: a company logo PNG with a transparent background needs to go into a supplier portal that only accepts JPG. After conversion the logo sits on clean white, which matches the white pages of the portal and of printed documents. Another common case is a scanned signature cut out as a transparent PNG: converting it gives a JPG you can paste into forms that reject PNG files. Because JPG is compressed, very thin lines can soften slightly, so compare the result with the original at full size before you submit it anywhere official.

This is the right choice when the image will sit on a white page, form or document. If you need to keep the transparency, for example to place a logo on a coloured website header, stay with PNG or convert to WebP, which also supports transparency. Pixel dimensions don't change.