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You can now run Gemini CLI in the browser

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Hello HN, we are thrilled to share with you in preview BrowserCode: A FOSS web app to run TUI agents (such as Claude Code, OpenCode, Gemini CLI and the like) fully in the browser. This first release focuses on Gemini CLI and Claude Code will follow soon. BrowserCode is released under the Apache License, version 2.0.BrowserCode is based on 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 to each CLI with the corresponding credentials, i.e. with your Google account or API key for Gemini CLI. All the data and execution stays completely local to the browser and it's persistent across sessions 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

HN · launched Apr 30, 2026 · 5 upvotes (top 89%) · 1 view

Niche: browser code execution environments · 38 launches, 5 in the last 7 days · Explore this niche →

Category and tags
  • Horizontal
  • Agent / copilot
  • Developer
  • AI-native
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 38 launches in browser code execution environments →

Could you build this?

Partial While terminal UI frontends using xterm.js are easy to assemble, executing CLI agent binaries like Gemini CLI entirely inside a browser sandbox requires WebAssembly compilation or WebContainers.

What it would actually take: The system requires compiling the agent runtime (Node.js, Go, or Python) to WebAssembly or running it inside a browser-based virtualization environment like WebContainers or v86, combined with an in-memory virtual filesystem and browser networking shims (WebSockets/WebRTC proxying for raw socket calls). The hard part is getting native CLI binaries and their POSIX process/network assumptions to execute deterministically within browser sandbox constraints. This requires familiarity with WASM toolchains (WASI, Emscripten) and browser-based virtualization.

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Competitors

Other products that read as similar to this one : 572 launches clear the similarity bar, closest 8 shown.

Attention rank: #529 of 573 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 171 days after the earliest competitor.

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