What is the role of the Internet in a possible trend toward secularization in the United States? This case study seeks to elucidate the process of online deconversion by examining religious exit narratives (called "extimonies" by participants) as posted in a forum for ex-Christians from 2005 to 2017. Echoing Mauss and Ebaugh, deconverts on the site went through a role exit involving a three-part, but intertwined, intellectual, emotional, and social process. The online community provided an interactional space for them to construct and practice new secular identities, to explore doubts and process emotions arising from the deconversion process, and to prepare themselves for offline interactions with believers. This case study also suggests that the Internet and online communities may provide spaces for the highly religiously committed to explore deconversion and role alternatives.