MUmultimillion·May 1, 2026
Hello HN!
This is the first release of BrowserCode (https://github.com/leaningtech/browsercode) a WebAssembly-based runtime to run coding agents (Claude Code, OpenCode, Gemini CLI, etc) fully in the browser. BrowserCode is released under the Apache License, version 2.0.
This first preview focuses on Gemini CLI, with Claude Code following soon.
BrowserCode uses BrowserPod (https://browserpod.io), an in-browser WebAssembly-based code sandboxing technology that can currently run Node.js, python, git, bash and many other command line tools. This will further expand to Ruby / Rails, Go, Rust and eventually x64 Linux binaries.
BrowserCode is free to use and unlimited. You'll need to login with your credentials, i.e. your Google account or API key. All the data and execution stays completely local to the browser and it's persistent across sessio
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ns thanks to a disk backend based on the Origin Private File System API or IndexedDB.
This is a preview release, so please try and break it! Please report issues on GitHub (https://github.com/leaningtech/browsercode) and star the repo if you like our work. Your support will help us push this project forward.
For any question or feedback please consider joining our Discord: https://discord.leaningtech.com