On Rotten Tomatoes, the movie holds an approval rating of 7% based on 58 critic reviews with an average rating of 3.3/10. The critical consensus reads ""Slender Man" might be thin, but he's positively robust compared to the flimsy assortment of scares generated by the would-be chiller that bears his name". On Metacritic, the movie has a weighted average score of 30 out of 100 based on 15 critics indicating "generally unfavorable reviews".