In this talk, I will cover several aspects related with the synthesis and sub-micrometer scale mechanical behavior of thin film metallic glasses (TFMGs). First, I will discuss the mechanical properties of freestanding Zr65Ni35 (%at.) TFMGs using an innovative method based on residual stress actuated micro-tensile set-up. I will show that TFMGs can sustain large homogenous deformation (~15%) with a yield strength close to the theoretical limit of ~3 GPa [1]. Then, I will discuss the fundamental plasticity mechanisms at the nanoscale showing that TFMGs report a fine short range order which is progressively disrupted by increasing the plastic deformation, but without the formation of mature shear bands [2]. In the second part of the talk, I will present recent results related with the synthesis of nanostructured Zr50Cu50 (%at.) TFMGs by Pulsed Laser Deposition (PLD). I will show how the control of PLD process parameters enables to synthetize different film microstructures including compact fully amorphous and amorphous nano-granular with tunable free volume interfaces. Then, I will discuss the mechanical properties using cutting edge in-situ TEM tensile test and I will show how the product yield strength/ductility can be modulated by controlling the microstructure reaching the outstanding values of 3 GPa and 9%, respectively. Finally, I will demonstrate the fabrication of highly transparent supercapacitors and electrodes using random networks of metallic glass nanotroughs reporting excellent stretchability (70%) and low sheet resistance (~3 Ω/sq), which are then integrated in wirelessly rechargeable and invisible skin heat patches, suggesting the use of TFMGs for next-generation stretchable electronic devices [3]. [1] M. Ghidelli et al., Acta Mater. 131 (2017) 246-259. [2] H. Idrissi, M. Ghidelli et al., Scientific Reports. 9, (2019) 1-11. [3] S. Lee, H. S. An, S.-W. Kim, M. Ghidelli, A. Li Bassi, S.-Y. Lee, J.-U. Park, Submitted to Nanoletters, (2020).