$ wasmtime-environ

v43.0.0

Standalone environment support for WebAssembly code in Cranelift

Downloads: 20.1M
Recent: 3.2M
Versions: 179
Updated: March 20, 2026

Latest Update Summary

Crate

Name: wasmtime-environ New version: 42.0.1 Release date: 2026-02-25T21:52:14.581809Z

Crate readme

Short description A standalone runtime for WebAssembly

Long description Wasmtime is a standalone runtime for WebAssembly, optimized for efficient instantiation and secure execution. It supports running WebAssembly components and offers capabilities for interacting with the host environment through the WASI standard. The crate is built on Rust's safety guarantees and undergoes careful review and testing.

Features • Fast • Secure • Configurable • WASI • Standards Compliant

Code Examples Installation Script

 curl https://wasmtime.dev/install.sh -sSf | bash

Basic Example

 fn main() {
    println!("Hello, world!");
}

rustup target add wasm32-wasip2
rustc hello.rs --target wasm32-wasip2

wasmtime hello.wasm

Linkshttps://wasmtime.dev/https://github.com/bytecodealliance/wasmtime/releaseshttps://docs.wasmtime.dev/cli-install.htmlhttps://docs.wasmtime.dev/stability-release.html#current-versionshttps://bytecodealliance.github.io/wasmtime/

https://docs.rs/wasmtime-environ/ https://api.github.com/repos/bytecodealliance/wasmtime/releases/290599990

Release info

Release version:

Release description

Code Examples

Major update: 42.0.1 → 43.0.0

$ DOWNLOADS TREND

16.4M20.1M

$ VERSION HISTORY

v43.0.0March 20, 2026
v42.0.1February 25, 2026
v41.0.0January 20, 2026
v40.0.2January 14, 2026
v40.0.1January 14, 2026
v40.0.1January 7, 2026
v40.0.0December 22, 2025
v39.0.1November 24, 2025

$ LINKS

$ INSTALL

cargo add wasmtime-environ

Or add to Cargo.toml: wasmtime-environ = "43.0.0"