This study aims to determine the students' perception of technology using the British Council LearnEnglish Web Platform to expand their grammar mastery. This research is descriptive qualitative. By using purposive sampling, there were thirty-eight students from the third semester in the English Study Program of STKIP PGRI Pacitan became the selected sample. The result of this study showed that there were thirteen numbers of students who still had difficulties understanding simple grammar materials and there were twenty-nine students who needed efforts to enhance their grammar mastery. The students had some perceptions of using the British Council LearnEnglish Web platform. The fifteen students declared that this application could not be used to improve their grammar mastery. At the same time, twelve students stated it was capable enough to enhance theirs. Besides, eight students claimed that the application effectively increased their grammar mastery. More than half of the students, 60%, agreed that there were positive responses to using this technology: the features of choosing test level were interactive and easy to operate. While the students' negative response is it needs supporting internet quota in the usage. So, it became an obstacle for students who live in the blank-spot area in Pacitan.