janson started webcam modeling in 2013, during the summer before her senior year of high school, on myfreecams.com, where she was discovered by an agent. she entered the adult film industry in august 2013, three months after her 18th birthday. her first time modeling was for "barely legal" magazine. her first sex scenes were for amateur allure and fucked hard 18. early in her career, she used the stage names anna and jillian brookes before adopting the janson one. she began feature dancing in march 2015. she was placed on cnbc's list of "the dirty dozen: porn's biggest stars" in 2016.