CLI, Batch Image Format Conversion

Here’s a neat trick to convert an image or batch convert a bunch of images from an Ubuntu CLI using ImageMagick.

Single File:

convert image.png image.jpg

Create thumbnails from all images in current directory:

for img in `ls *.jpg`
do
  convert -sample 25%x25% $img thumb-$img
done

Batch convert with the ImageMagick mogrify tool:

mogrify -format jpg *.png

magick mogrify -resize 50% rose.jpg

magick mogrify -resize 256x256 *.jpg

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