Studies conducted so far have mainly focused on the effects of online concordancers on teaching vocabulary, while there is a lack of research focusing on the effects of online concordancers on teaching and learning grammar. Thus, this study aims to review the studies on the effects of online concordancers on teaching and learning grammar and how online concordancers promote learning grammar in English as a foreign language (EFL) context to make recommendations for researchers and to guide teachers in the light of current research results. The study reviews the studies that focused on the effects of online concordancers on teaching and learning grammar. Results show that the use of online concordancers and authentic texts promote teaching grammar in EFL learning and teaching processes. In the light of the results, it is recommended that teachers should integrate online concordances into their classroom practices to teach grammar and vocabulary effectively. It is also recommended that further research should focus on the relationship between learner and teacher differences and the use of online concordancers in teaching and learning grammar.