The background of this study was students' perceptions of the Quillbot on their writing ability. This study aimed to find out students' perceptions and the effects of Quillbot on their writing ability. This research used a qualitative approach with a semi-structured interview method to obtain the perception of using the Quillbot on students' writing ability. The population of this study was the 2021 batch of students in the English education study program of UIN Ar-Raniry. The sample consisted of eight students. The results showed that students' perceptions of Quillbot indicated it could improve writing skills and correct wrong writing. Additionally, the effects of Quillbot on students included an increase in vocabulary knowledge and a tendency to become dependent on paraphrasing tools. This study suggested that students could use the paraphrase tool as an auxiliary tool rather than as a tool to create their written works.