Image-based sexual abuse (IBSA) involves three key behaviors: the non-consensual taking or creation of nude or sexual images; the non-consensual sharing or distribution of nude or sexual images; and threats made to distribute nude or sexual images. IBSA is becoming increasingly criminalized internationally, representing an important and rapidly developing cybercrime issue. This paper presents findings of the first national online survey of self-reported lifetime IBSA perpetration in Australia (n = 4053), with a focus on the extent, nature, and predictors of perpetration. Overall, 11.1% (n = 411) of participants self-reported having engaged in some form of IBSA perpetration during their lifetime, with men significantly more likely to report IBSA perpetration than women. With regard to the nature of perpetration, participants reported targeting men and women at similar rates, and were more likely to report perpetrating against intimate partners or ex-partners, family membersand friends than strangers or acquaintances. Logistic regression analyses identified that males, lesbian, gay or bisexual participants, participants with a self-reported disability, participants who accepted sexual image-based abuse myths, participants who engaged in or experienced sexual self-image behaviors, and participants who had a nude or sexual image of themselves taken, distributed, and/or threatened to be distributed without their consent were more likely to have engaged in some form of IBSA perpetration during their lifetime.