This article explores the effectiveness of international social media (Twitter) campaigns, as a modern form of transnational advocacy networks, seeking domestic legal change in Iran for women’s rights. Using the spiral model of human rights change and second wave normative theories, the article critiques current thought on social media as an advocacy tool using evidence from two Iranian campaigns. Gathering empirical data from the #stopstoning and #letwomengotostadium campaigns, the research finds that Twitter campaigns may be linked to regression in some areas of women’s rights. Early evidence indicates that social media may lead to amplified government backlash, lack of campaign persistence and foreign overshadowing of domestic voices, which all contribute to the ongoing problematisation of the role of transnational advocacy networks in domestic human rights change.