# mogrify > Perform operations on multiple images, such as resizing, cropping, flipping, and adding effects. > Changes are applied directly to the original file. > More information: . - Resize all JPEG images in the directory to 50% of their initial size: `mogrify -resize {{50%}} {{*.jpg}}` - Resize all images starting with "DSC" to 800x600: `mogrify -resize {{800x600}} {{DSC*}}` - Convert all PNG images in the directory to JPEG: `mogrify -format {{jpg}} {{*.png}}` - Halve the saturation of all image files in the current directory: `mogrify -modulate {{100,50}} {{*}}` - Double the brightness of all image files in the current directory: `mogrify -modulate {{200}} {{*}}`