STARDIS performs local thermodynamic equilibrium (LTE) radiative transfer calculations to generate synthetic stellar spectra from input model atmospheres. Built in part on structures from TARDIS (ascl:1402.018), it ingests configuration files and atomic data, computes opacity and radiation transport through a spherically symmetric plasma, and produces spectral outputs over user-specified wavelength grids. The package includes tools for setting up environments, running model configurations, and plotting resulting spectra in interactive workflows. STARDIS supports modular experimentation with opacity sources, transport options, and model parameters to facilitate generation and analysis of synthetic spectra.