Is it safe to delete .tmp files?

Hi, my Macbook is running out of diskspace and I’d like to delete 3 GB of .tmp files stored at /Application Support/Libre Office/4/user/temp/ – can I safely delete them? Most of those files or from 2015-2019.

Is there a “disk cleaner” for Mac (like CCleaner for Windows) that would recommend which files can be safely deleted?