QuickBEAM – run JavaScript as supervised Erlang/OTP processes

In plain words

QuickBEAM is a JavaScript runtime that runs inside the Erlang/OTP virtual machine, allowing JavaScript code to execute as supervised OTP processes. It is designed for full-stack developers who need to run JavaScript—for server-side rendering, sandboxed user code, or third-party scripts—while maintaining integration with Erlang/Elixir systems. Each runtime can call Elixir code, send and receive messages, spawn processes, and access browser-style APIs like fetch and WebSocket. The runtime includes memory and execution limits for sandboxing, supports a native DOM that Erlang can read directly, and eliminates JSON serialization overhead between languages.

written from the facts on this page · September 2026

From the sources

JavaScript runtime for the BEAM — Web APIs backed by OTP, native DOM, and a built-in TypeScript toolchain. - elixir-volt/quickbeam

In the maker’s words, at launch

QuickBEAM is a JavaScript runtime embedded inside the Erlang/OTP VM. If you’re building a full-stack app, JavaScript tends to leak in anyway — frontend, SSR, or third-party code. QuickBEAM runs that JavaScript inside OTP supervision trees. Each runtime is a process with a `Beam` global that can: - call Elixir…

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