This study investigates the carbonization process of beachside waste utilizing a community-scale carbonizer. The waste samples were collected from Bang Saen Beach, located in Chonburi Province on the east coast of Thailand, which is a popular tourist destination from the results of the research, it was found that a total of 16 categories of waste could be separated. The three primary types of waste identified are plastic, small other wastes, and wood or organic waste. Their respective proportions are 58.47%, 14.94%, and 14.35%, respectively. The carbonization reactor involves two different chambers: combustion and carbonization. The former generates heat through the combustion of rubber firewood, which is then directed to the carbonization chamber. Exhaust gases are treated using a water scrubber. Carbonization occurs at a temperature of 450 °C with a heating rate of 2.325 °C/min. The primary wet yield of beachside waste char stands at 43.47%, while the calorific value of beachside waste char is 2,176 cal/g.