JPG is the practical output when dependable support matters more than transparency. It works across older applications, marketplace forms, documents, email clients, and common photo libraries.
JPG cannot store transparency. Transparent WebP pixels are placed on white, and lossy output should be reviewed around text, gradients, and fine texture.
A sensible production check starts with one demanding source: inspect fine edges, skin or product texture, gradients, text, and the final background at the size people will actually see. Compare output weight with visual quality instead of assuming the smallest file is automatically best. Keep original WebP masters outside the converted folder, because a JPG delivery copy is not a substitute for editable source material. For recurring catalog or publishing work, record the chosen quality and naming pattern so future batches remain consistent. This repeatable check is especially useful for broad compatibility, where a technically valid file can still be unsuitable if compression, background handling, or naming does not match the destination.