# NOS-TLPlot

NOS-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.

## Features

- 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

## Links

- [nos-tlplot.vercel.app](https://nos-tlplot.vercel.app)
- [Paper (JORS)](https://openresearchsoftware.metajnl.com/articles/10.5334/jors.635)

- Price: free
- Open source: yes
- Alternative to: robvis
- Categories: Analysis and Computations
- Fields: Medicine
- Platforms: Web
- Tags: Visualization, Systematic Review
- Listed: 2026-10-15
- Page: https://tools.kausalflow.com/tools/nos-tlplot/

Source: Tools for Academic Research (https://tools.kausalflow.com/), CC BY-SA 4.0.