My image optimization trio as of now: - GIF: gifski (squeeze out the best possible out of the ancient format) - PNG: pngquant (lossy but respectful of what ma

My image optimization trio as of now: - GIF: gifski (squeeze out the best possible out of the ancient format) - PNG: pngquant (lossy but respectful of what many PNGs are: lots of flat surfaces + limited color palette, transparency) - JPG: jpegli (writing this post mostly to share the news about this one, it's new from libjxl learnings, approximately as good qualitatively as Guetzli, but 1000x faster -actual number, not an exaggeration-. It's amazing! https://github.com/libjxl/libjxl/tree/main/lib/jpegli https://github.com/libjxl/libjxl/tree/main/lib/jpegli ) Below's my lil' `image-opt` helper making for a nice workflow to optimize any gif/jpg/png file(s) :) #!/usr/bin/env bash set -euo pipefail dbg() { if [ "${DEBUG:=false}" = 'true' ]; then echo "$@"; fi } die() { echo "Error: $*" 1>&2; zenity --error --text="$*"; exit 1; } if ! command -v pngquant > /dev/null; then die 'You must install pngquant'; fi if ! command -v cjpegli > /dev/null; then die 'You must install cjpegli'; fi if ! command -v gifsicle > /dev/null; then die 'You must install gifsicle'; fi for filename in "${@:1}"; do if [ -d "$filename" ]; then echo && echo "ℹ File '$filename' is a directory. Skipping." continue fi if [ ! -f "$filename" ]; then echo && echo "ℹ File '$filename' does not exist. Skipping." continue fi extension_raw="${filename##*.}" extension="${extension_raw,,}" # Convert to lowercase if [[ "$extension" != 'jpg' && "$extension" != 'png' && "$extension" != 'gif' ]]; then echo && echo "ℹ Skipping file $filename due to unsupported extension: .$extension" continue fi filename_noext="${filename%.*}" filename_original="${filename_noext}_beforeOpt.${extension_raw}" filename_final="${filename_noext}.${extension}" dbg "filename($filename), filename_noext($filename_noext), extension($extension), filename_original($filename_original)" echo && echo " Compressing $filename ..." mv "$filename" "$filename_original" if [ "$extension" == 'jpg' ]; then cjpegli "$filename_original" "${filename_noext}_q50.${extension}" -q 50 cjpegli "$filename_original" "${filename_noext}_q60.${extension}" -q 60 cjpegli "$filename_original" "${filename_noext}_q70.${extension}" -q 70 cjpegli "$filename_original" "${filename_noext}_q80.${extension}" -q 80 cjpegli "$filename_original" "${filename_noext}_q90.${extension}" -q 90 elif [ "$extension" == 'png' ]; then pngquant --strip --force --verbose --output "$filename_final" "$filename_original" elif [ "$extension" == 'gif' ]; then # https://kornel.ski/lossygif , set --lossy to 20 for light compression, 200 for heavy gifsicle -O3 --lossy=50 --verbose --output "$filename_final" "$filename_original" fi gio trash "$filename_original" done sync