This research presents the junior high school students’ perception toward English videos on Tiktok to improve their vocabulary mastery. The rapid growth of technology brought many changes in various aspect, one of them is in realm education. It gave rise to different kinds of social networking access that provide convenience in communication each other. With the development of this, social media also has many beneficial which used by a lot of people. As international language, English became a language that everyone should be able to speak English. Learning English is not easy, students need a mobile application that can make it easier for them to learn English. They are several platform are provide video feature that can be used by the students, with a variety platform which provide video feature, make young learners like to use it. One of them is Tik-Tok. In this study, the researcher was conduct a qualitative research method with a qualitative descriptive design. The participants of this study was 10 students’ from one of junior high school in Malang, those students are including 5 females and 5 males. The 10 selected students, were selected by using teachers recommendation which stated that the 10 students had the same tendency and ability in English subject to explore the students’ perception toward English videos on Tik-Tok to improve their vocabulary mastery, direct interview were used as the methods of collecting the data. The instruments used in this research were interview by using theory derived from Harding (2003). The finding showed that Tiktok was considered very helpful by the participants because they used TikTok as a means to watch videos about vocabulary or educational videos. The participants said that they got some information or knowledge about vocabulary by watching videos on the Tikok. They also knew a lot about various content which consist of many random video including educational video. The participants said that by using Tiktok they could get some information or knowledge about vocabulary. The video are provide English vocabulary raise their motivation and their interest to know some new vocabulary. Keyword: Perception, Tiktok Videos, Vocabulary Mastery.