WebAssembly is a promising new technology that aims to bring performant, safe, multi-language features to browsers and fundamentally shift the web away from a Javascript monoculture. The WebAssembly effort is largely driven by browser vendors (Mozilla, Google, Microsoft, et. al.) but it provides a sandboxing framework designed for use outside the browser as well. Edge compute services, such as content delivery networks, mesh networks and edge cloud services, seek efficiency in engineering tradeoffs between performance, isolation, security and safety. WebAssembly has the potential to transform edge compute engineering by providing performant, secure execution of untrusted code in arbitrary applications. In this talk Jonathan Foote will cover salient aspects of WebAssembly, sandboxing technology, and early progress in research and development towards a security-hardened, high-performance sandbox design for running untrusted code on the server.