Standardizing WASI: A system interface to run WebAssembly outside the web

Running WebAssembly outside the browser became surprisingly popular in 2018. However, some companies were doing it in a very unsafe way—completely abandoning the sandboxing that made WebAssembly safe.

That motivated us at Mozilla to push for a standardized, secure-by-default way for the guest to interact with the host. This became the WebAssembly System Interface, aka WASI.

Read Standardizing WASI: A system interface to run WebAssembly outside the web on Mozilla's Hacks blog.