The rise of user-generated content (UGC), such as internet memes and amateur videos, enables new possibilities for mediatization of the past. However, these possibilities can facilitate not only more diverse and less top-down engagements with memory, but also lead to its trivialization and distortion of historical facts. The latter concerns are particularly pronounced in the case of memories about mass atrocities (e.g. the Holocaust), where online media are often used to promote denialism and attack the victims’ dignity. To better understand the relationship between UGC and memory mediatization, we examine a selection of internet memes dealing with Anne Frank, an iconic Holocaust victim. Using a combination of inductive content analysis and close reading, we identify four classes of Anne Frank memes: (1) ad hominems; (2) deniers; (3) trivializers; and (4) thought provokers. Our findings demonstrate the multi-faceted functionality of memes, which are used not only to trivialize Holocaust memory, but also to reinforce canonical narratives about Anne Frank, and highlight the dependency of memes on other forms of memory mediatization, thus raising questions about the interrelations between UGC and institutionalized forms of remembrance.