This is the introduction to the special issue on ‘human trafficking, sexual exploitation and digital technologies’. This special issue contributes to the knowledge base by bringing together four articles that focus on the use of online platforms by human traffickers for the purposes of commercial sexual exploitation. In doing so, this special issue explores the affordances of online platforms to human traffickers, the challenges faced by law enforcement and other actors seeking to intervene in human trafficking in the digital age, and perhaps pathways towards overcoming these challenges in the future.