This research aims to determine the effectiveness of using Spotify in improving students’ vocabulary mastery. Vocabulary is one language component that is essential for speaking, listening, writing, and reading. However, students often have problems with vocabulary when speaking, reading, writing, or listening to English words. This can be caused by several factors. This research employed the effectivity of using Spotify by using a quantitative approach. This research was investigated by using a pre- and post-test to get students abilities and a questionnaire to know what students perceived. The sample in this research used a purposive sampling with students of EFL Batch 2021 students. The finding of this research found that the mean score of the students on the pre-test was 74.40, whereas the average score on the post-test, or exam taken following treatment, was 84.80. Following the period of treatment, scores significantly improved, as indicated by the researcher above. From the results of the hypothesis carried out also shows based on the Paired Sample t-test criteria. H0 is rejected and HA is approved because there is a significant difference in the vocabulary mastery scores between the pre- and post- test. However, the findings of the second study question indicate that the majority of students agree with the claims made on Spotify's effectiveness. This shows how well Spotify helps in vocabulary learning for students.