Virtual Machine for the Web

cheerp cheerpx cpp lwip repl tailscale vm wasm webassembly webvm xterm-js

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README.md

WebVM

This repository hosts the source code of for https://webvm.io, a Linux virtual machine that runs in your browser.

WebVM is a server-less virtual environment running fully client-side in HTML5/WebAssembly. It's designed to be Linux ABI-compatible. It runs an unmodified Debian distribution including many native development toolchains.

WebVM is powered by the CheerpX virtualization engine, and enables safe, sandboxed client-side execution of x86 binaries on any browser. CheerpX includes an x86-to-WebAssembly JIT compiler, a virtual block-based file system, and a Linux syscall emulator.

How to: general usage

go to https://webvm.io
use the provided terminal environment
have fun!

How to: enable networking

go to https://webvm.io
click "Tailscale Login" in the top right corner
log in to Tailscale (create an accout if you don't have one)
if you want to access the public internet, you need an Exit Node. See here for how to set one up. If you just want to access a machine in your Tailscale Network, you don't need it
depending on your network speed, you may need to wait a few moments for the Tailscale Wasm module to be downloaded
log in with your Tailscale credentials
go back to the WebVM tab. You will see your IP address in the top right
start firing network requests!

Given the short-lived nature of WebVM, we log into Tailscale as an Ephemeral Node. This means that the node will disappear from your Tailscale Network after a period of inactivity. It also means that when you reload the tab, you need to log in again. It should be faster the second time.

Bugs and Issues

Please use Issues to report any bug.

Browsers support

WebVM and CheerpX are compatible with any browser, both Desktop and Mobile, provided support for SAB, IndexedDB, and the device having enough memory.

Thanks to...

This project depends on:

CheerpX, made by Leaning Technologies for the virtualization part
xterm.js, https://xtermjs.org/, for providing the Web-based terminal emulator
Tailscale for the networking component
lwIP for the TCP/IP stack, compiled to the Web by Cheerp