Tiny Url

From time to time I need to shorten my url.  For example if I am sending out a message using Remind101 to my  students, then my Google Docs url is too short so I get a truncated one.  For example, here is the entire url for a webquest my US government students are working on (concerning the presidential election if you are interested) https://docs.google.com/document/d/1vFqnQlkG6itPL8ONSWonp_SVMd3O4Zft8-SW24A46x8/edit?hl=en_US and here is the tinyurl: http://tinyurl.com/6s72ust  Both end up at the same page.