The study examined the use of Pixton to support the teaching of English as a foreign language (EFL) writing to students at a private university in southern Ecuador. For this purpose, 52 EFL students (male and female, aged 19–24 years old) who were enrolled in a writing course participated in the study for a period of five months. At the start, most of these students had an A1+ proficiency level, according to the Common European Framework of Reference for Languages (CEFR). The study employed an action research design. A diagnostic test was applied at the beginning of the instruction period, and, at the end, a final exam and a perceptions questionnaire were administered. The findings indicate positive perceptions about Pixton, and students’ online writing skills improved due to the pedagogical use of this technological tool. Furthermore, Pixton increased students’ engagement, motivation and dynamic work to a remarkable extent. Finally, an improvement was observed in aspects of students’ writing, such as grammar, vocabulary, coherence and cohesion.