Graphitic carbon nitride (g-C3N4) nanosheets are among 2D attractive materials due to presenting unusual physicochemical properties. Nevertheless, no adequate information exists about their mechanical and thermal properties. Therefore, we used classical molecular dynamics simulations to explore the thermal conductivity and mechanical response of two main structures of single-layer triazine-based g-C3N4 films. By performing uniaxial tensile modeling, we found remarkable elastic modulus of 320 and 210 GPa for two different structures of g-C3N4 sheets. Using equilibrium molecular dynamics simulations, the thermal conductivity of free-standing g-C3N4 structures were also predicted to be around 7.6 W/mK and 3.5 W/mK. Our study suggests the g-C3N4 films as exciting candidate for reinforcement of polymeric materials mechanical properties. (C) 2015 Elsevier B.V. All rights reserved.