This website provides an interactive visualization of the data from the article, “Exploring carbon footprint reduction pathways through urban lifestyle changes: a practical approach applied to Japanese cities” that was published in Environmental Research Letters. This study estimated the carbon footprint of the average citizen in 52 major Japanese cities (prefectural capitals and government-designated cities), identified 65 decarbonized lifestyle options related to mobility, housing, food, leisure, and consumer goods, and assessed city-wise greenhouse gas reduction potentials.