Story

I was wondering... why do we need a Mac Mini, a VPS, or a Docker container to run OpenClaw?

Your browser already has a secure sandboxed OS, a database, a filesystem, and a JS engine. What if we just... used those?

So I built OpenBrowserClaw inspired by the simplicity of NanoClaw but running entirely in a browser tab.

- Claude API with full tool-use loop

- Shell commands in a v86-emulated Alpine Linux (yes, a Linux VM in WASM, in your browser)

- File I/O via OPFS

- Data persistence in the browser local storage

- Telegram integration over plain HTTPS

- Zero runtime dependencies

No server. No deploy. No infra. Open a tab, paste your Claude API key, start chatting.

It even works as a PWA, install it on your phone if you want.

The whole thing is MIT-licensed and open source: https://github.com/sachaa/openbrowserclaw

Or just try it right now without cloning anything: https://www.openbrowserclaw.com/

Sometimes the best server is the one you already have open.