The CASSL pipeline analyzes strong lensing in JWST data. First, the code forecasts galaxy-scale strong lenses for JWST, including Einstein radii down to θ_E=0.02″ systems (generalizable to other telescopes and selection criteria). The code also simulates images of galaxy-scale strong lenses for JWST in the range 0.02″<θ_E<1.5″. These simulations use the VELA hydrodynamical simulations as very realistic lensed source galaxies. CASSL employs empirically motivated parameter distributions to generate realistic datasets of simulated strong lensing images.