Wasm3 installation

Windows

Download wasm3-win-x64.exe or wasm3-win-x86.exe from the latest release page.

macOS

Use Homebrew to build and install automatically:

brew install wasm3

Cosmopolitan / Actually Portable Executable

APE is a polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD + NetBSD + BIOS.
Download wasm3-cosmopolitan.com from the latest release page

OpenWRT

Follow instructions here.

Arduino / PlatformIO / Particle.io library

Find Wasm3 in the Library Manager and install it.

Python module

pip3 install pywasm3