WasmKit

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

Usage

Command Line Tool

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!

As a Library

Swift Package Manager

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: "0.0.5"),
],

You can find API documentation on the Swift Package Index.

Implementation Status

Category	Feature	Status
WebAssembly MVP	Parsing binary format	✅ Implemented
	Parsing text format (WAT)	✅ Implemented
	Execution	✅ Implemented
	Validation	🚧 Partially implemented
WebAssembly Proposal	Reference types	✅ Implemented
	Bulk memory operations	✅ Implemented
	Mutable globals	✅ Implemented
	Sign-extension operators	✅ Implemented
	Non-trapping float-to-int conversions	✅ Implemented
	Memory64	✅ Implemented
	Threads and atomics	🚧 Parser implemented
WASI	WASI Preview 1	✅ Implemented

Testing

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

Acknowledgement

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