Trans related content. However, because most social media platforms are not built with trans people in mind and because online networks include people who may not accept one's trans identity, sharing trans content can be difcult. We studied Trans Time, a social media site developed particularly for trans people to document transition and build community. We interviewed early Trans Time users (n = 6) and conducted focus groups with potential users (n = 21) to understand how a trans-specifc site uniquely supports its users. We found that Trans Time has the potential to be a safe space, encourages privacy, and efectively enables its users to selectively view content using content warnings. Together, safety, privacy, and content warnings create an online space where trans people can simultaneously build community, fnd support, and express both the mundanity and excitement of trans life. Yet in each of these areas, we also learned ways that the site can improve. We provide implications for how social media sites may better support trans users, as well as insular communities of people from other marginalized groups. people often use social media to connect with others, fnd and share resources, and post transition-CCS Concepts: • Human-centered computing → Human computer interaction (HCI); Social media; Empirical studies in collaborative and social computing.