Thanks - but why would you not include the script as a copy-paste'able text?

Thanks for creating this! For anyone who wants to just copy/paste instead of re-typing:
for f in "$@"
do
/usr/local/bin/cwebp -q 75 "$f" -o "${f%.*}.webp"
done

https://uploads.disquscdn.c... I get 'no such file or directory'. *(The action “Run Shell Script” encountered an error: “-: line 2: /usr/local/bin/cwebp: No such file or directory
-: line 2: /usr/local/bin/cwebp: No such file or directory”)

Can you assist with that?

type "which cwebp" to give your location, that's what worked for me.

You can use free online tools like Convert JPG to WEBP provided by the ConvertOnline.org. You can choose multiple JPG files in one go, and just click a button to convert them all to WEBP. All the images will be converted to WEBP, and would be ready for download.

Thanks for this! Would you happen to know of a script that does the reverse, webp --> jpg?

I ended up installing homebrew/imagemagick and used a similar script:

for img in "$@"; do
filename=${img%.*}
/usr/local/bin/convert "$img" -background white -flatten "$filename.jpg"
done