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The growth of the textile industry in Indonesia brings harm to the environment as disposal of wastewater to the river bodies still contains dangerous dyes. This affects the life of aquatic biota and the health of surrounding communities that use river water for domestic needs. To overcome this problem, N-doped Carbon Nanodots (N-doped CNDs) as photocatalysts can be used as an alternative in degrading Methylene Blue through photocatalytic process. N-doped CNDs from molasses have been successfully synthesized using H2O2 followed by the Microwave-Assisted Extraction (MAE) method. The synthesized N-doped CNDs possess average particle size of 1.5 nm observed by TEM. The properties of N-doped CNDs emit blue fluorescence under UV light 365 nm and show peak absorption at wavelength of 220 nm. Vibration peaks of OH, C-H, C = O, N-H, C-N functional groups are observed by FTIR at wavenumbers 3246.94 cm-1, 2929.06 cm-1, 1656.08 cm-1, 1590.27 cm-1 and 1036.98 cm-1 respectively. The success of nitrogen doping within CNDs is proven by FTIR analysis showing an increase of absorbance of C-N and N-H groups of N-doped CNDs. The potential of N-doped CNDs as photocatalysts for the degradation of methylene blue became the object of this study. The results showed that the degradation efficiency of methylene blue using 3 mL N-doped CNDs at pH 10 exhibited the most optimal degradation efficiency. Under these conditions, the degradation efficiency resulting from the use of 254 nm 11 W UV lamps and 14.5 W Philips LED lamps in 270 minutes is 96.8% and 97.2% consecutively.