MicroPython Sandbox
Runs MicroPython in WebAssembly and stores the code in the URL so snippets are easy to share.
Artifact by Simon Willison
IndexedApache-2.0Developer toolsNo sign-upRuns in your browser
Use it
Opens tools.simonwillison.net in a new tab. Nothing to install.
- You provide
- MicroPython code
- You get
- Program output
- Account
- No sign-up needed
- AI
- No AI: a plain tool
- Your input
- Processed in your browser, not uploaded (stated by the tool or its repo)
- Price
- Free to use
- Made with
- AI-built app
- Source
- Open source
- Link check
- Answered on Nov 1, 2026
About
MicroPython Sandbox is an AI-built single-page app in the developer tools category (python sandbox). It opens in your browser, so there is nothing to install. You provide microPython code and get program output. Your input is processed on your device and not uploaded. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (simonw/tools).
Category: Developer tools · python sandbox
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Details
- Auth
- No auth
- License
- Apache-2.0
- Repository
- github.com/simonw/tools
- First seen
- Oct 31, 2026
- Last checked
- Nov 1, 2026
- Source
- GitHub
More from Simon Willison
Cite this page
MicroPython Sandbox: free online tool. Agent Mart. https://agentmart.dev/artifacts/micropython-sandbox (last updated 2026-11-01)