#images

14 one-liners with this tag.

Convert images to AVIF recursively

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec sh -c 'for f; do [ -e "$f.avif" ] || avifenc -s 6 "$f" "$f.avif" >/dev/null; done' sh {} +

cautionImages and performance

Convert images to WebP recursively

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec sh -c 'for f; do [ -e "$f.webp" ] || cwebp -quiet -q 80 "$f" -o "$f.webp"; done' sh {} +

cautionImages and performance

Find images larger than a given pixel size

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec identify -format '%w %h %i\n' {} + 2>/dev/null | awk -v max=2560 '$1 > max || $2 > max'

harmlessImages and performance

Find images without a loading attribute on a page

$curl -s https://example.com/ | tr '\n' ' ' | grep -oiE '<img[^>]*>' | grep -vi 'loading='

harmlessImages and performance

Find images without an alt attribute on a page

$curl -s https://example.com/ | tr '\n' ' ' | grep -oiE '<img[^>]*>' | grep -viE '\balt='

harmlessSEO checks

Find large images in wp-content/uploads

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' -o -iname '*.gif' -o -iname '*.webp' \) -size +500k -printf '%s\t%p\n' | sort -rn | head -50 | numfmt --field=1 --to=iec

harmlessImages and performance

Limit JPEG quality to a maximum with jpegoptim

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' \) -exec jpegoptim --strip-all --preserve --max=82 {} +

destructiveImages and performance

Optimize JPEG images losslessly with jpegoptim

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' \) -exec jpegoptim --strip-all --preserve {} +

cautionImages and performance

Optimize PNG images losslessly with optipng

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f -iname '*.png' -exec optipng -o2 -strip all -preserve {} +

cautionImages and performance

Regenerate missing thumbnails

$wp media regenerate --only-missing --yes --path=/var/www/vhosts/example.com/httpdocs

Remove dangling Docker images

#docker image prune

Remove EXIF and other metadata from images

$exiftool -r -ext jpg -ext jpeg -all= -overwrite_original /var/www/vhosts/example.com/httpdocs/wp-content/uploads

destructiveImages and performance

Resize large images to a maximum size with mogrify

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec mogrify -resize '2560x2560>' {} +

destructiveImages and performance

Shrink PNG images lossily with pngquant

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f -iname '*.png' -exec pngquant --quality=65-85 --skip-if-larger --strip --force --ext .png {} +

destructiveImages and performance