How to compress multiple folders, each into its own zip archive?

here

for i in */; do tar -czvf "${i%/}.tar.gz" "$i"; done

for i in *
do
[ -d "$i" ] && zip -r "$i.zip" "$i"
done

You walk through all the directories and create zip for each of them.

Or even more concise:

for i in */; do zip -r "${i%/}.zip" "$i"; done

(thanks to damienfrancois for suggestion).