Kyushu – A self-hostable WASM sandbox for JavaScript workers

Kyushu is a developer tool that provides a self-hostable WebAssembly sandbox for running JavaScript workers, isolating untrusted code execution within a browser or server environment. It is designed for developers who need secure, performant offloading of third-party or user-generated scripts without compromising the main application. Its use of WASM-based isolation is interesting because it offers a lightweight, portable alternative to traditional iframe or VM-based sandboxing, enabling fine-grained security controls with minimal overhead.