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Top 14 Python WebAssembly Projects
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Project mention: A peek into a possible future of Python in the browser | news.ycombinator.com | 2025-02-25
Pyodide has numpy, scipy, matplotlib, pandas, and as of last month, even polars. https://github.com/pyodide/pyodide/pull/5282
Pyodide is far from a perfect CPython and even the packages it includes often have limitations you won't find when running natively. But there's definitely enough here to be interesting and even somewhat useful. Here's an interactive app written on Pyodide that uses astropy, numpy, and matplotlib: https://shinylive.io/py/examples/#orbit-simulation
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youre-the-os
A game where you are a computer's OS and you have to manage processes, memory and I/O events.
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ITK-Wasm
High performance spatial analysis in a web browser and across programming languages and hardware architectures
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https://github.com/jupyter-xeus/xeus-r
emscripten-forge/recipes already has packages for "r-askpass, r-base, r-base64enc, r-bit, r-bit64, r-cachem, r-cli, r-colorspace, r-data.table, r-digest, r-dplyr, r-ellipsis, r-fansi, r-farver, r-fastmap, r-ggrepel, r-glue, r-haven, r-hexbin, r-htmltools, r-isoband, r-jsonlite, r-later, r-lattice, r-lazyeval, r-magrittr, r-mass, r-matrix, r-mgcv, r-mime, r-nlme, r-plyr, r-promises, r-purrr, r-rcpp, r-readr, r-rlang, r-sp, r-stringi, r-sys, r-tibble, r-tidyr, r-tzdb, r-utf8, r-vctrs, r-vroom, r-xfun, r-yaml" in WASM: https://github.com/emscripten-forge/recipes/tree/main/recipe...
It looks like xeus-r and webr both compile with emscripten; for which there's emscripten-forge which is like conda-forge but for browser WASM.
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WasmBench
A large dataset of real-world WebAssembly binaries, collected from the Web, GitHub, NPM and other sources. Useful as test data, to study WebAssembly, for training machine learning models, and much more.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Python WebAssembly discussion
Python WebAssembly related posts
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Web Translator API
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You Wouldn't Download a Hacker News
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Java Minecraft in the Browser
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Run Python in the Browser Effortlessly
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Show HN: Self-hosteable browser-based minimalist web-searching platform
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JavaScript Implementation of Python
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PyScript: An open source platform for Python in the browser
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A note from our sponsor - SaaSHub
www.saashub.com | 2 Sep 2025
Index
What are some of the best open-source WebAssembly projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | pyodide | 13,618 |
| 2 | youre-the-os | 1,882 |
| 3 | pdfium-lib | 1,000 |
| 4 | pygbag | 441 |
| 5 | ppci | 343 |
| 6 | puepy | 301 |
| 7 | ITK-Wasm | 219 |
| 8 | webassembly-lua | 136 |
| 9 | jupyterlite-sphinx | 87 |
| 10 | recipes | 65 |
| 11 | WasmBench | 61 |
| 12 | scummvm-demo | 11 |
| 13 | golang-wasm | 6 |
| 14 | watim | 5 |
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