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Wasmer enables super lightweight containers based on WebAssembly that can run anywhere: from Desktop to the Cloud and IoT devices, and also embedded in any programming language.

This readme is also available in: 🇨🇳 中文-Chinese • 🇪🇸 Español-Spanish • 🇫🇷 Français-French • 🇯🇵 日本語-Japanese.

Features

• Fast & Safe. Wasmer runs WebAssembly at near-native speed in a fully sandboxed environment.

• Pluggable. Wasmer supports different compilation frameworks to best suit your needs (LLVM, Cranelift...).

• Universal. You can run Wasmer in any platform (macOS, Linux and Windows) and chipset.

• Standards compliant. The runtime passes official WebAssembly test suite supporting WASI and Emscripten.

Quickstart

Wasmer ships with no dependencies. You can install it using the installers below:

curl https://get.wasmer.io -sSfL | sh

With PowerShell (Windows)

iwr https://win.wasmer.io -useb | iex

See wasmer-install for more installation options: Homebrew, Scoop, Cargo...

Executing a WebAssembly file

After installing Wasmer you should be ready to execute your first WebAssembly file! 🎉

You can start by running QuickJS: qjs.wasm

$ wasmer qjs.wasm
QuickJS - Type "\h" for help
qjs >

Here is what you can do next:

• Use Wasmer from your Rust application
• Publish a Wasm package on WAPM
• Read more about Wasmer

Language Integrations

📦 Wasmer runtime can be used as a library embedded in different languages, so you can use WebAssembly anywhere.

	Language	Package	Docs
	Rust	wasmer Rust crate	Docs
	C/C++	wasmer.h headers	Docs
	C#	WasmerSharp NuGet package	Docs
	D	wasmer Dub package	Docs
	Python	wasmer PyPI package	Docs
	Javascript	@wasmerio NPM packages	Docs
	Go	wasmer Go package	Docs
	PHP	wasm PECL package	Docs
	Ruby	wasmer Ruby Gem	Docs
	Java	wasmer/wasmer-jni Bintray package	Docs
	Elixir	wasmex hex package	Docs
	R	no published package	Docs
	Postgres	no published package	Docs
	Swift	no published package
	Zig	no published package

👋 Missing a language?

Contribute

We welcome any form of contribution, especially from new members of our community 💜

You can check how to build the Wasmer runtime in our awesome docs!

Testing

Test you want? The Wasmer docs will show you how.

Community

Wasmer has an amazing community of developers and contributors. Welcome, please join us! 👋

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