wasmtime
A standalone runtime for WebAssembly
A Bytecode Alliance projectThe Wasmtime CLI can be installed on Linux and macOS with a small install script:
sh
$ curl https://wasmtime.dev/install.sh -sSf | bash
Windows or otherwise interested users can download installers and binaries directly from the GitHub Releases page.
If you've got the Rust compiler installed then you can take some Rust source code:
rust
fn main() {
println!("Hello, world!");
}
and compile/run it with:
sh
$ rustup target add wasm32-wasi
$ rustc hello.rs --target wasm32-wasi
$ wasmtime hello.wasm
Hello, world!
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.
You can use Wasmtime from a variety of different languages through embeddings of the implementation:
wasmtime
crate]wasm.h
, wasi.h
, and wasmtime.h
headerswasmtime
PyPI package]Wasmtime
NuGet package]wasmtime-go
repository]📚 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.