<p>The scarcity of two-dimensional intrinsic room-temperature ferromagnetic semiconductors poses a significant challenge to the growth of future low-dimensional semiconductor spintronic devices. However, it is still unclear whether the ferromagnetic characteristics in dilute magnetic semiconductors (DMS) originate intrinsically or from the incorporation of dopants. This study utilized a low-temperature hydrothermal method to create functional semiconducting Cr-doped SnS₂ nanocrystals. Using various characterization techniques, we analyzed the impact of chromium dopant concentration on the structural, optical, and magnetic properties of the as-prepared SnS₂ nanoparticles doping with chromium (1%, 3%, 5%, 7%). X-ray diffraction (XRD) showed that pristine and chromium-incorporated SnS₂ possess a hexagonal structure with good crystallinity. Structural analysis substantiated that the SnS₂ nanoparticles have a hexagonal phase, further supported by Raman studies. Field Emission Scanning Electron Microscopy (FESEM) studies exposed that the nanoparticles possess flower-like or layered morphologies. Energy Dispersive X-ray Spectroscopy (EDAX) verified the absence of impurities in synthesized nanoparticles. Band gap variation for the doped samples related to the host sample was determined using UV-visible diffuse reflection spectroscopy. Photoluminescence spectra showed defect-related emissions with a pronounced peak in the visible range. The magnetization (M-H) curves were analyzed using the modified Brillouin function. The magnetization and field-dependent magnetization (M-H) curves indicated that as the doping concentration increases, the Cr-doped SnS₂ nanoparticles transition from paramagnetic to weak ferromagnetic behavior. Thus, this research on Cr-doped SnS₂ nanocrystals presents a promising avenue for enhancing spintronics and magneto-optics by adjusting optical and magnetic properties through targeted doping for various functional applications.</p>