Wasmer is a fast and secure WebAssembly runtime that enables super lightweight containers to run anywhere: from Desktop to the Cloud, Edge and IoT devices.
This document is also available in:
π¨π³ δΈ ζ -Chinese β’π©πͺ Deutsch-German β’πͺπΈ EspaΓ±ol-Spanish β’π«π· FranΓ§ais-French β’π―π΅ ζ₯ζ¬ θͺ -Japanese β’π°π· νκ΅μΈ -Korean.
Features
- Secure by default. No file, network, or environment access, unless explicitly enabled.
- Supports WASI and Emscripten out of the box.
- Fast. Run WebAssembly at near-native speeds.
- Embeddable in multiple programming languages
- Compliant with latest WebAssembly Proposals (SIMD, Reference Types, Threads, ...)
Install
Wasmer CLI ships as a single executable with no dependencies.
curl https://get.wasmer.io -sSfL | shOther installation options (Powershell, Brew, Cargo, ...)
Wasmer can be installed from various package managers. Choose the one that fits best for your environment:
-
Powershell (Windows)
iwr https://win.wasmer.io -useb | iex
-
Homebrew (macOS, Linux)
brew install wasmer
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Scoop (Windows)
scoop install wasmer
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Chocolatey (Windows)
choco install wasmer
-
Note: All the available features are described in the
wasmer-clicrate docscargo install wasmer-cli
Looking for more installation options? See the
wasmer-installrepository to learn more!
Quickstart
You can start by running
QuickJS, a small and
embeddable Javascript engine compiled as a WebAssembly module (qjs.wasm):
$ wasmer qjs.wasm
QuickJS - Type "\h" for help
qjs > const i = 1 + 2;
qjs > console.log("hello " + i);
hello 3Here is what you can do next:
π¦ Language Integrations
The Wasmer runtime can be used as a library embedded in different languages, so you can use WebAssembly anywhere.
| Language | Package | Documentation | |
|---|---|---|---|
 |
Rust | wasmer Rust crate |
Learn |
 |
C/C++ | wasmer.h header |
Learn |
 |
C# | WasmerSharp NuGet package |
Learn |
 |
D | wasmer Dub 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 |
 |
Elixir | wasmex hex package |
Learn |
 |
R | no published package | Learn |
 |
Postgres | no published package | Learn |
 |
Swift | no published package | |
 |
Zig | no published package | |
 |
Dart | wasm pub package |
|
 |
Crystal | no published package | Learn |
 |
Lisp | under heavy development - no published package |
Contribute
We appreciate your help!
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!