Image format comparison

JPEG vs PNG

JPEG is compact and lossy for photographs; PNG is lossless and supports transparency.

PropertyJPEGPNG

Extension.jpg.png

MIME typeimage/jpegimage/png

TransparencyNoYes

AnimationNoNo

Lossless modeNoYes

Lossy modeYesNo

Practical recommendation

Use JPEG for photos without alpha and PNG for transparent graphics, screenshots or repeated editing.