In vitro cardiac fibrosis models that monitor fibrotic markers have been developed to better understand fibrotic progression in humans. However, these platforms lack the ability to non-invasively monitor change in tissue stiffness, a hallmark of fibrosis. This motivated the development of a microtissue platform capable of non-invasive tissue stiffness measurement. Tissue stiffness on the platform was determined by force readouts through deflection of a PDMS rod and tissue strain achieved by noncontact magnetic stretching. As proof of concept, no difference was found in on-chip and tensile test measurements of rubber band stiffness. Tissue stiffness measurements on-chip failed due to reliability issues with the platform. However, when manually stretched, tissue stiffness determined on-chip was not different from that measured by atomic force microscopy. Full realization of this platform will result in fibrotic microtissue stiffness tracking throughout an experiment, leading to a better understanding of cardiac fibrosis progression.