Yes it is safe to free up some space by deleting the the snap cache in /var/lib/snapd/snaps/ when the folder grows large. This should actually remove that dir and all traces of snaps on your system.

How do you delete a snap folder?

The basic command line to remove a snap package is sudo snap remove <package>. You have to put the name of a specific application instead of <package>.

What is snap folder Ubuntu?

snap files are kept in the /var/lib/snapd/ directory. When running, those files will be mounted within the root directory /snap/. Looking over there — in the /snap/core/ subdirectory — you’ll see what looks like a regular Linux file system. It’s actually the virtual file system that’s being used by active snaps.