Developing scalable electrical stimulating platforms for cell and tissue engineering applications is limited by external power source dependency, wetting resistance, microscale size requirements, and suitable flexibility. Here, we developed a versatile and scalable platform that enables tunable electrical stimulation for biological applications by harnessing the giant magnetoelastic effect in soft systems to convert gentle air pressure (100 - 400 kPa) and yield current values of up to 10.5 mA and 9.5 mV. The platform is shown to be easily manufactured and scaled up for integration in multi-well magnetoelastic plates via three-dimensional (3D) printing. We demonstrated that the electrical stimulation generated by this platform enhanced the conversion of fibroblasts into neurons up to 2-fold (104%) and subsequent neuronal maturation up to 3-fold (251%). This easily configurable electrical stimulation device has broad applications in high throughput organ-on-a-chip systems and paves the way for future development of neural engineering, including cellular therapy via implantable self-powered electrical stimulation devices. This article is protected by copyright. All rights reserved.