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preswald
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preswald

Preswald is a WASM packager for Python-based interactive data apps: bundle full complex data workflows, particularly visualizations, into single files, runnable completely in-browser, using Pyodide, DuckDB, Pandas, and Plotly, Matplotlib, etc. Build dashboards

by StructuredLabs · GitHub
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aianalyticsanalytics-engineeringApache-2.0Python
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Build interactive data applications that run entirely in a web browser, sharing complex data workflows easily.

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4.29k4.28k
2026-07-072026-08-31
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📄 About

Preswald is a WASM packager for Python-based interactive data apps: bundle full complex data workflows, particularly visualizations, into single files, runnable completely in-browser, using Pyodide, DuckDB, Pandas, and Plotly, Matplotlib, etc. Build dashboards

preswald has 4.3k stars on GitHub. It has been forked 647 times. preswald is written mainly in Python. It has been in active development since 2024. preswald is available under the Apache-2.0 license. Its main topics are ai, analytics, analytics-engineering, copilot.

Frequently asked questions

What is preswald?

Preswald is a WASM packager for Python-based interactive data apps: bundle full complex data workflows, particularly visualizations, into single files, runnable completely in-browser, using Pyodide, DuckDB, Pandas, and Plotly, Matplotlib, etc. Build dashboards

Is preswald open source?

preswald is an open-source project. It is released under the Apache-2.0 license.

Is preswald free?

Yes. preswald is free and open source — you can use, modify and self-host it.

What license does preswald use?

preswald is available under the Apache-2.0 license.

What language is preswald written in?

preswald is written mainly in Python.

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