NOS-TLPlotNOS-TLPlot is an open-source Python tool that visualises Newcastle–Ottawa Scale (NOS) risk-of-bias assessments for systematic reviews and meta-analyses, turning star ratings into traffic-light plots, heatmaps, radar charts and other summary figures. Web Medicine Analysis and Computations Visualization Systematic Review nos-tlplot.vercel.app Paper (JORS) Converts NOS star ratings into standard risk-of-bias categories 12 visualisation types (traffic-light, heatmap, radar, lollipop and more) Export to PNG, PDF, SVG and EPS Streamlit web app and command-line interface Batch processing and customisable themes Open source