Carbon monoxide (CO) is widely employed in catalytic carbonylative reactions to efficiently introduce carbonyl groups into a variety of molecules, generating a plethora of high-value fine chemicals. However, its toxicity and handling risks pose significant challenges. In recent years, carbon dioxide (CO₂) has emerged as a promising, non-toxic, and abundant alternative for CO-based transformations. Moreover, flow technology has revolutionised reactions involving toxic gases and hazardous chemicals, providing improved efficiency, enhanced safety, and precise reaction parameters control. Here, we present a continuous flow chemistry platform for carbonylation reactions, in which CO is in situ generated using the photo- and electrochemical reduction of CO₂. A series of carbonylation processes were investigated under continuous flow conditions. As a result of a comprehensive assessment of parameters, we identified optimal reaction conditions that enabled rapid transformations, high selectivity, and good to excellent yields. Our findings highlight the potential of CO₂ valorisation in carbonylation chemistry and demonstrate the synergy with continuous flow technology, paving the way for safer and more sustainable carbonylation methodologies.