This study investigated the impact of Quizizz on English vocabulary learning and learner autonomy with 60 second-year students at Thai Nguyen University. Over 10 weeks, students initially used traditional methods before transitioning to Quizizz for vocabulary practice. Surveys conducted before and after the experiment revealed increased enthusiasm, motivation, and autonomy among students using Quizizz. The findings suggest that Quizizz effectively enhances vocabulary learning and promotes independent study, encouraging its broader use in English education in the digital age.