Dropshare has a built-in URL shortener service. Depending on your URL shortener configuration (Preferences -> Uploads -> URLs), you can shorten any URL by
- dragging & dropping the URL from e.g. your browser to the Dropshare icon in your menu bar
- copying a URL to your clipboard and using the "Upload From Clipboard" keyboard shortcut
The shortened URL will be copied to your clipboard afterwards. When enabling "Large-type shortened URLs on screen" in the General preferences, the shortened URL will be shown on your screen briefly e.g. for easy verbal sharing.