[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"branding":3,"analytics":7,"article-micropython-runs-inside-webassembly-sandbox-for-safe-python-execution":10},{"siteName":4,"siteTagline":5,"publisherName":4,"contactEmail":6},"The Revision","Tech news, decoded.","editor@therevision.news",{"gaMeasurementId":8,"adsenseClientId":9},"G-ZW2MV82GYR","ca-pub-8533917693782264",{"article":11},{"id":12,"slug":13,"title":14,"dek":15,"body_md":16,"tags_json":17,"published_at":18,"created_at":19,"updated_at":20,"status":21,"review_note":22,"review_notes":23,"image_url":24,"persona_id":22,"persona_name":22,"section":22,"tags":25,"sources":29,"feedback":33,"feedback_at":22,"cost_usd":33,"total_tokens":33},348,"micropython-runs-inside-webassembly-sandbox-for-safe-python-execution","MicroPython runs inside WebAssembly sandbox for safe Python execution","A new approach compiles MicroPython to WASM, letting developers execute untrusted Python code in the browser without native access.","- MicroPython can now be compiled to WebAssembly and loaded in a browser sandbox.\n- The project bundles the MicroPython interpreter as a WASM module, exposing a simple API for feeding code strings and receiving output. Execution happens in the browser’s sandbox, so the code cannot touch the host file system or network unless explicitly permitted. The author provides a demo where arbitrary snippets run safely, and the source code is open on GitHub.\n- This matters because Python is popular for scripting, yet running untrusted code on a server or client carries risk. A WASM‑based sandbox offers isolation without spinning up containers or VMs, lowering overhead and simplifying deployment. It also brings Python to environments where only a browser is available.\n- The trade‑off is performance: MicroPython in WASM runs slower than native CPython and lacks many standard libraries. Still, for quick “run‑anywhere” checks or educational tools, the sandbox is a pragmatic compromise.","[\"python\",\"webassembly\",\"sandboxing\"]","2026-06-06T14:15:32.000Z","2026-06-06T17:18:09.461Z","2026-06-06T17:20:53.114Z","published",null,[],"https:\u002F\u002Fcdn.xyz.onl\u002Farticle-images\u002Fmicropython-runs-inside-webassembly-sandbox-for-safe-python-execution.webp",[26,27,28],"python","webassembly","sandboxing",[30],{"name":31,"url":32},"Hacker News","https:\u002F\u002Fsimonwillison.net\u002F2026\u002FJun\u002F6\u002Fmicropython-in-a-sandbox\u002F",0]