This study examines the impact of the web-based “modul ajar” of the Merdeka Curriculum on the success of fourth-grade English students at SD Muhammadiyah 3 Parepare. The study aims to assess the quality and efficiency of the web-based “modul ajar” of the Merdeka Curriculum to improve student English learning outcomes and to identify the factors affecting the effectiveness of these modules. The research methodology employed a mixed-methods approach, combining quantitative pre-and post-tests of English subjects for fourth-grade students at SD Muhammadiyah 3 Parepare with qualitative feedback from users regarding the web-based “modul ajar” visual components. These evaluations show a significant improvement in students' understanding of English, with no significant differences in English comprehension levels between the two groups. Furthermore, most users express promising responses to the visual components of the web-based “modul ajar”. In conclusion, the web-based “modul ajar” positively impacts English learning, accentuating the importance of improving technology quality, ensuring stable Internet connectivity, enhancing the functionality and accessibility of it, adjusting learning materials to meet individual learners' needs, and exploiting its features to facilitate interactive learning.