With the pervasive nature of social media and Internet use among young adults, researchers have begun to explore experiences of online disinhibition, defined as reductions in restraint in online versus face-to-face settings. In contributing to this literature, this study aimed to test whether perceptions of the Internet as a place where one has the ability to be invisible, anonymous, and exercise control over interactions promotes greater online disinhibition. A sample of Australian young adults (N = 687; 59.8 percent female; Mage = 19.45 years, SD = 2.07) were included in the study. The sample was split to enable exploratory and confirmatory factor analyses on the measures of Internet perceptions, with results finding two subfactors; (a) perceptions of the ability to be protected, invisible, or feel safe online (labeled protection), and (b) perceptions of control over interactions and self-presentation online (labeled control). Links between perceptions of protection and control, and online disinhibition were then examined, before testing social anxiety as a moderator of these links. Results demonstrated that perceptions of protection, but not control, significantly predicted online disinhibition in young adults. Furthermore, this relationship was moderated by social anxiety such that young adults high in both social anxiety and perceptions of protection reported the highest online disinhibition. This study highlights novel perceptions of online contexts, illustrates their links with online disinhibition, and demonstrates how social anxiety may interact with perceptions of protection in predicting online experiences.