DE

↑ ↓ select, Enter open, Esc close

Convert images to AVIF recursively

cautionImages and performancedebian, ubuntu

Caution: This command changes the system. Understand what it does before you run it.

Adjust the values, the command updates live
user@server
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 {} +

Creates a file bild.jpg.avif next to each JPEG and PNG and skips images that were already converted. AVIF often compresses even better than WebP, but encoding is considerably slower. A lower speed value gives slightly better compression at the cost of more CPU time.

Note: avifenc is part of the libavif-bin package. With many images the run can take a long time and put noticeable load on the server, so it is best started with nice.

Open question before approval: Paketname libavif-bin auf Debian 12 und Ubuntu 24.04 bestätigen. Die Option -q für die Qualität gibt es erst ab libavif 1.0 (Ubuntu 24.04), Debian 12 hat 0.11, daher hier nur -s (Geschwindigkeit 0 bis 10).

Also searched as

  • bulk convert jpg to avif linux
  • convert images to avif command line
  • generate avif images for website
  • avifenc recursive conversion

Related one-liners

All in Images 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 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

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

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

Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

  • All commands are provided without warranty and are not tested on every system.
  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
  • You run commands at your own risk. Liability for damages is excluded to the extent permitted by law.