Background and Objectives: The present article aims to analyze the effect of variable viscosity and mixed convection on a nanofluid transport over a stretching surface under the influence of transverse magnetic field. The nanofluid viscosity is taken to be temperature dependent. Namely, Reynolds and Vogel's models are incorporated to examine the effect of variable viscosity Moreover, the influence of applied transverse magnetic field and mixed convection are also examined. Significances: The numerical investigation is performed on the governing nonlinear system of equations by means of shooting algorithm. The computational procedure is carried out by after simplifications of governing physical flow problem formulated in the Cartesian coordinate system. Conclusions: The key findings include that temperature dependent viscosity contributes to decelerating fluid flow and upsurges nanofluid temperature distribution. Moreover, mixed convection contributes to accelerating fluid flow and upsurge in temperature distribution. The increase in nanoparticles volumetric fraction plays a significant role in enhancing thermal conduction of water. The maximum temperature was attained for blade shaped nanoparticles of copper. Furthermore, skin friction coefficient and Nusselt number magnitude are higher in case of bricked shaped nanoparticles of silver. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.