A new video compressor tool was developed using FFMPEG and WebAssembly.
webassembly
14 tracked signals on webassembly.
Simon Willison released micropython-wasm, an alpha sandbox for safely running Python code via MicroPython in WebAssembly.
“I'd love to be able to run plugin-style code in an environment where it is unable to read unapproved files, connect to a network, or generally operate in a way that's risky or harmful to the rest of the application or the user's computer.”
Datasette Agent gets a MicroPython sandbox for safe AI-generated code execution
“GPT-5.5 has so far failed to break out of the sandbox!”
Simon Willison ran Python ASGI apps in-browser via Pyodide and Service Workers, fixing prior JavaScript execution limits.
“of figuring out how to run Python ASGI apps in Pyodide using Service Workers instead, and it seems to work!”
Cloudflare Python Workers reach general availability after a two-year preview, running Python via Pyodide/WebAssembly.
“Python is now a first-class, fully supported language on the Cloudflare Developer Platform”
Pyodide WASM wheels can now be published directly to PyPI and installed at runtime via micropip.
“Moving forward, package maintainers can simply build and publish Pyodide wheels to PyPI, just as they do for native wheels on Linux, macOS, or Windows.”
WebAssembly components enable sandboxed, portable AI agent extensions via MCP integration.
Simon Willison used Claude Fable to build a browser-based SQLite query plan explainer.
“Maybe one day I'll learn to read a query plan.”
Simon Willison built a browser playground testing whether OPFS can let Pyodide edit persistent local SQLite files.
“I've been pondering if Datasette Lite - the Python Datasette application run entirely in the browser using Pyodide and WebAssembly - might be able to edit persistent SQLite files stored on the user's computer.”
micropython-wasm 0.1a1 released with fixes for datasette-agent-micropython integration
Simon Willison releases MicroPython WASM sandbox for safe Python code execution
Simon Willison's markdown-svg-renderer now converts animated SVGs to MP4 via in-browser WebAssembly ffmpeg
Simon Willison released luau-wasm 0.1a0, a WASM build of the Luau language packaged for Pyodide.
Simon Willison released micropython-wasm 0.1a2, adding a CLI to the sandboxed MicroPython tool.
“I added a CLI to micropython-wasm, inspired by the first draft of the blog entry when I realized it would be a great way to illustrate the Try it yourself section.”