Platinum diselenide (PtSe₂) is a layered two-dimensional (2D) material with outstanding electronic and piezoresistive properties ^[1–3]. It has demonstrated its potential for membrane-based pressure sensor devices, where poly(methyl methacrylate) (PMMA) supported and suspended the PtSe₂ membranes ^[4]. The impact of the polymer support layer on the response of the suspended 2D material is still under investigation ^[5]. To study the strain and the piezoresistive behavior, we fabricated and analyzed devices based on suspended PtSe₂ membranes with and without polymer support.