The use of Information & Communication Technology (ICT) tools to support foreign language teaching and learning has become very common nowadays and makes learning more enjoyable. This study focused on students’ perceptions of using Blooket in teaching and learning English vocabulary. The study case and questionnaires were used to survey (72 non-English major students) and face-to-face interviews (7 students and 3 teachers) to collect data at Long An College of Education (LACE), Vietnam. Data collection was conducted for two months at this site. The data were obtained from the questionnaires sent to students via Google Forms, then analyzed by SPSS software version 26. From the data analysis, the author found that students were very interested in learning vocabulary through http://blooket.com, a classroom game website, which offers a wide variety of interactive and innovative games. The disadvantage is that this site does not allow audio and video to be inserted into the questions and answers; images cannot be inserted into the answer either; and there is a limit of 60 participants if using a free account. Furthermore, with an older version of the phone, you must download the Firefox browser in order to join the game. These disadvantages can all be easily solved. Therefore, it is evident that Blooket is an effective learning medium that helps to increase students' vocabulary when used in online or offline classes by teachers or when learners use it themselves at home to learn vocabulary. Based on data analysis, findings and conclusions were drawn along with some pedagogical advice.