Link shorteners are some of the most often used tools in the Twitter ecosystem. While Twitter itself has been offering it’s own t.co URL shortener for a while, it was never integrated into the Twitter.com web interface. That’s changing today. Twitter now automatically shortens links for URLs that take up more than 13 characters and will also ensure that links don’t point to sites that are reported to be malicious.
This feature is starting to roll out to “a small percentage of users” today, so don’t worry if you don’t see it yet. According to Twitter, it will eventually be available for everyone.