WasmKit is a standalone and embeddable WebAssembly runtime implementation written in Swift.

The best way to learn how to use WasmKit is to look at the Examples directory.

WasmKit provides a command line tool to run WebAssembly binaries compliant with WASI.

$ git clone https://github.com/swiftwasm/WasmKit.git
$ cd WasmKit
$ swift run wasmkit-cli run ./Examples/wasm/hello.wasm
Hello, World!

You can use WasmKit as a Swift Package Manager dependency by adding the following to your Package.swift file:

dependencies: [
    .package(url: "https://github.com/swiftwasm/WasmKit.git", from: "0.1.0"),
],

You can find API documentation on the Swift Package Index.

• Reasonably fast
• Minimal dependencies
  • The core runtime engine depends only on swift-system.
  • No Foundation dependency
• Compact and embeddable
  • Debug build complete in 5 seconds¹
• Batteries included
  • WASI support, WAT parser, etc.

WasmKit engine works on all major platforms supported by Swift. It is continuously tested on macOS, Ubuntu, and Windows, and should work on the following platforms:

• macOS 10.13+, iOS 12.0+, tvOS 12.0+, watchOS 6.0+
• Ubuntu 20.04+
• Windows 10+

The minimum supported Swift version of WasmKit is 5.8, which is the version used to bootstrap the Swift toolchain in ci.swift.org.

To run the WasmKit test suite, you need to checkout the test suite repositories first.

# Checkout test suite repositories
$ ./Vendor/checkout-dependency
# Run tests
$ swift test

This project was originally developed by @akkyie, and is now maintained by the community.