tl;dr: Woxi is an open-source reimplementation of the Wolfram Language interpreter written in Rust, runnable entirely in the browser with no data sent to servers. It ships with multiple front-ends: an in-browser playground, a CLI tool (faster-starting than wolframscript, with shebang support), a Jupyter kernel (also available via JupyterLite), and Woxi Studio, a native notebook editor for `.nb` files with export to `.ipynb`, Markdown, LaTeX, Typst, and PDF.