The increasing concentration of carbon dioxide (CO2) in the Earth’s atmosphere is a pressing environmental challenge, contributing to global warming and climate change. Addressing CO2 emissions through innovative technologies is critical for achieving sustainability and mitigating environmental impacts. Among various strategies, the electrochemical conversion of CO2 into valuable chemicals and fuels emerges as a promising approach. This method not only offers a pathway to reduce atmospheric CO2 levels but also provides a sustainable alternative to fossil fuel-based resources. This chapter delves into the principles, advancements, and challenges of electrochemical CO2 conversion, highlighting its significance and potential in addressing environmental concerns.