For JPG / WebP, quality 75-85 typically yields a JFIF 60-80% smaller than the JPG with no visible difference at normal viewing distance. For lossless JFIF (PNG, TIFF), expect smaller savings — usually 5-30% via better deflate / LZW compression than the source already had.
Pelên JPG kompresyoneke windabûyî ya ku ji bo wêneyan hatîye çêtirkirin bikar tînin, di heman demê de kalîteya dîtbarî diparêzin û mezinahîyên pelên piçûk peyda dikin.