Wasmer

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The leading WebAssembly Runtime supporting WASI and Emscripten

Wasmer is a blazing fast and secure WebAssembly runtime that enables incredibly lightweight containers to run anywhere: from Desktop to the Cloud, Edge and your browser.

• Secure by default. No file, network, or environment access, unless explicitly enabled.
• Pluggable. supports WASIX, WASI out of the box.
• Incredibly Fast. Run WebAssembly at near-native speeds.
• Embeddable anywhere via Wasmer SDKs

Install Wasmer

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

Other installation options (Powershell, Brew, Cargo, ...)

_Wasmer can be installed from various package managers. Choose the one that fits best for your environment:_ * Powershell (Windows) ```powershell iwr https://win.wasmer.io -useb | iex ``` - Homebrew (macOS, Linux) ```sh brew install wasmer ``` - Scoop (Windows) ```sh scoop install wasmer ``` - Chocolatey (Windows) ```sh choco install wasmer ``` - Cargo binstall ```sh cargo binstall wasmer-cli ``` - Cargo _Note: All the available features are described in the [`wasmer-cli` crate docs](https://github.com/wasmerio/wasmer/tree/main/lib/cli/README.md)_ ```sh cargo install wasmer-cli ``` > Looking for more installation options? See [the `wasmer-install` > repository](https://github.com/wasmerio/wasmer-install) to learn > more!

Note: You can also try Wasmer online in wasmer.sh

Quickstart

You can start by running Cowsay:

$ wasmer run cowsay "hello world"
 _____________
< hello world >
 -------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
               ||----w |
                ||     ||

There are many more available packages, such as wasmer/python or quickjs. Create your own package, or explore packages from the community: https://wasmer.io/explore

Here is what you can do next:

• Run a package
• Publish a package
• Deploy your website
• Read more about Wasmer

Wasmer SDK

You can use the Wasmer runtime embedded in different languages with the Wasmer SDK:

	Language	Package	Documentation
	Rust	wasmer Rust crate	Learn
	C	wasm.h header	Learn
	C++	wasm.hh header	Learn
	C#	WasmerSharp NuGet package	Learn
	D	wasmer Dub package	Learn
	Zig	wasmer Zig package	Learn
	Python	wasmer PyPI package	Learn
	Javascript	@wasmerio NPM packages	Learn
	Go	wasmer Go package	Learn
	PHP	wasm PECL package	Learn
	Ruby	wasmer Ruby Gem	Learn
	Java	wasmer/wasmer-jni Bintray package	Learn
	R	no published package	Learn
	Postgres	no published package	Learn
	Swift	no published package
	Dart	wasm pub package
	Crystal	no published package	Learn
	Lisp	no published package
	Julia	no published package
	V	no published package
	OCaml	wasmer OCaml package

👋  Missing a language?

Develop

We have different guides to help you develop Wasmer:

• Build Wasmer from Source
• Testing
• Security advisory

Contribute

We appreciate your help! 💜

We recommend reading the following guide on how to contribute into a complex project successfully: https://mitchellh.com/writing/contributing-to-complex-projects

Check our docs on how to build Wasmer from source or test your changes.

Community

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

• Wasmer Community Discord
• Wasmer on Twitter

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README also in: 🇨🇳 中 文 -Chinese • 🇩🇪 Deutsch-German • 🇪🇸 Español-Spanish • 🇫🇷 Français-French • 🇯🇵 日本 語 -Japanese • 🇰🇷 한국어 -Korean.