QEMU TCG · WebAssembly · xterm.js · Alpine x86-64

A real Linux console inside the browser.

This page boots a minimal x86-64 Alpine development guest under QEMU-WASM, connects its serial console to a PTY-backed terminal, and attaches durable browser-managed OPFS disks.

Runtime payload — cached once by the local gateway

Checking browser capabilities Running the bundled WebAssembly preflight module.

VM is stopped

Start Alpine to open its serial development console.

Page: unknown
QEMU: unknown
Serial RX: unknown
Serial TX: unknown
Workers: 0
Round trip: —

First boot

Guest sequence

1
At the login prompt, enter:root
2
Mount tools and persistence:select Run bootstrap
3
Store an API login:codex-login
4
Start in the shared project:cd /workspace && codex-browser

The API key is entered inside the guest terminal. The website never asks for or stores it in application state.

Runtime cache

Loading manifest…

Operational boundary

What this build does

Runs a real x86-64 Linux kernel and userspace, not a JavaScript command imitation.
Keeps VM compute in the browser; the local Node process only caches immutable assets.
Uses the upstream browser Fetch network proxy, so CORS and browser-controlled headers still apply.
Requires a current 64-bit Chromium browser and substantial available memory.