Individuals who reject sacrificial harm to maximize overall outcomes, consistent with deontological (vs. utilitarian) ethics, appear warmer, more moral, and more trustworthy. Yet, deontological judgments may not only convey emotional reactions, but also strict adherence to moral rules. We therefore hypothesized that people view deontologists as more morally absolutist and hence self-righteous—as perceiving themselves as morally superior. In addition, both deontologists and utilitarians who base their decisions on rules (vs. emotions) should appear more self-righteous. Four studies (N = 1254) tested these hypotheses. Participants perceived targets as more self-righteous when they rejected (vs. accepted) sacrificial harm in classic moral dilemmas where harm maximizes outcomes (i.e., deontological vs. utilitarian judgments), but not parallel cases where harm fails to maximize outcomes (Study 1). Preregistered Study 2 replicated the focal effect, additionally indicating mediation via perceptions of moral absolutism. Study 3 found that targets who reported basing their deontological judgments on rules, compared to emotional reactions or when processing information was absent, appeared particularly self-righteous. Preregistered Study 4 included both deontological and utilitarian targets and manipulated whether their judgments were based on rules versus emotion (specifically sadness). Grounding either moral position in rules conveyed self-righteousness, while communicating emotions was a remedy. Furthermore, participants perceived targets as more self-righteous the more targets deviated from their own moral beliefs. Studies 3 and 4 additionally examined participants' self-disclosure intentions. In sum, deontological dilemma judgments may convey an absolutist, rule-focused view of morality, but any judgment stemming from rules (in contrast to sadness) promotes self-righteousness perceptions.