The importance of vocabulary is expected to be a provision for individuals in developing the ability to communicate and socialize in a global society. The first step A new language is absorbed, indeed, by enriching vocabularies of the new language before finally learning the rules and the context. The introduction of vocabulary can be started with simple vocabulary until, it forms a sentence or paragraph. One of the efforts to enrich vocabularies is through interactive learning, one of which is the use of Wordwall web applications. Wordwall is a web-based application that can be used as learning media such as interactive quizzes, pairings, random words, and anagrams. From the field observations, it appeared that the interest in learning English by students of Informatics study program is very high, but they have difficulty expressing their thoughts in English due to the lack of vocabulary. Regarding this, research was designed in the form of a class action research. The research was conducted in three cycles in which the first cycle was before using Wordwall and another two cycles were conducted after using Wordwall. Each cycle provided data in a form of students’ scores. The results of this study revealed an increase in vocabulary understanding after conducting learning and tests using the Wordwall Web Application.