A learning strategy that is quite varied so that it needs a more practical and creative evaluation tool. Evaluation is still manual, giving students an opportunity to share their answer keys during the exam. This research aims to implement an evaluation tool using electronic media or commonly called electronic test (E-Exam) of chemical material in grade X SMAN 4 Padangsidimpuan. In order to change the teacher’s behavior of the learning pattern/assessment traditionally moved/migrated towards communicative system by utilizing information technology both offline and online. The study aims to develop a Exam View Test Generator Evaluation tool in accordance with BSNP standards, due diligence on expert validator lecturer and chemical teachers, as well as to the critical thinking ability of students of chemistry lessons in X-grade odd semester SMAN 4 Padangsidimpuan. Research and Development (R&D) methods use the Model DDD-E (Decide, Design, Develop, Evaluate). The results of the research with the average of expert validator feasibility test scores of 3.59 are Valid and do not need revision (worth). Based on the results of the hypothesis testing on the critical thinking ability of the students acquired SIG value. < 0.05 ie = 0.46 < 0.05 so that Ha was accepted and Ho was rejected.