Lossless
Strip unused objects, compress streams. No quality loss. Best for keeping text selectable.
Recommended
Low
Structural optimization. Text stays sharp and selectable.
Fast
Medium
Structural optimization. Text stays sharp and selectable. Good balance.
Balanced
Maximum
Renders each page as high-quality image. Text stays visually sharp but is no longer selectable. Dramatic size reduction.
Smallest
YMOBooks