This user script allows for easy sharing of your inputs to Special:ExpandTemplates. It adds a button that, when clicked, copies a shareable URL to your exact invocation of the page, like this. Other editors do not need to have this script installed in order to access the URL generated.
To install, add {{subst:lusc|User:Rummskartoffel/share ExpandTemplates url.js}} to your common.js.