Shrink: Photo Compressor is the ultimate photo compressor. Set an exact maximum size, not a vague quality percentage. Compress up to 20 photos in one batch. Before and after sizes shown for every result. Start straight from the Photos share sheet, without opening the app. Save to a dedicated Shrink album, or share anywhere. Photos already under your target are left untouched, so nothing is degraded for no reason. Accepts JPEG, HEIC and PNG; compressed results are saved as JPEG.