Preswald

Preswald is the Python framework that converts data scripts into fast, interactive web apps and dashboards with zero frontend code.

Preswald is a powerful, open-source Python framework designed to bridge the gap between raw data analysis and production-ready applications. It allows data scientists and analysts to transform existing Python scripts into fully interactive data apps, dashboards, and internal tools without writing any JavaScript (JS). The core architecture utilizes a Directed Acyclic Graph (DAG) execution model for smart dependency tracking, ensuring only necessary components update for instant, reactive performance. It packages the full data stack—including Pyodide, DuckDB, and Plotly—to run entirely in the browser, enabling static-site deployment and offline functionality. Deployment is a one-command operation, making it efficient for teams to share sophisticated tools, like financial reports or custom analytics, instantly.

https://preswald.com