A Bytecode Alliance project
Installation
The Wasmtime CLI can be installed on Linux and macOS with a small install
script:
$ curl https://wasmtime.dev/install.sh -sSf | bash
Windows or otherwise interested users can download installers and
binaries directly from the GitHub
Releases page.
Example
If you've got the Rust compiler
installed then you can take some Rust
source code:
fn main() {
println!("Hello, world!");
}
and compile/run it with:
$ rustup target add wasm32-wasi
$ rustc hello.rs --target wasm32-wasi
$ wasmtime hello.wasm
Hello, world!
Features
-
Lightweight. Wasmtime is a standalone runtime for WebAssembly that scales
with your needs. It fits on tiny chips as well as makes use of huge servers.
Wasmtime can be embedded into almost any application too. -
Fast. Wasmtime is built on the optimizing Cranelift code generator to
quickly generate high-quality machine code at runtime. -
Configurable. Whether you need to precompile your wasm ahead of time,
generate code blazingly fast with Lightbeam, or interpret it at runtime,
Wasmtime has you covered for all your wasm-executing needs. -
WASI. Wasmtime supports a rich set of APIs for interacting with the host
environment through the WASI standard. -
Standards Compliant. Wasmtime passes the official WebAssembly test
suite, implements the official C
API of wasm, and implements
future proposals to WebAssembly as
well. Wasmtime developers are intimately engaged with the WebAssembly
standards process all along the way too.
Language Support
You can use Wasmtime from a variety of different languages through embeddings of
the implementation:
- Rust - the
wasmtimecrate - C - the
wasm.h,wasi.h, andwasmtime.hheaders - Python - the
wasmtimePyPI package - .NET - the
WasmtimeNuGet package - Go - the
wasmtime-gorepository
Documentation
📚 Read the Wasmtime guide here! 📚
The wasmtime guide is the best starting point to learn about what
Wasmtime can do for you or help answer your questions about Wasmtime. If you're
curious in contributing to Wasmtime, it can also help you do
that!
It's Wasmtime.