WebAssembly runtime embedded in Godot game engine
A WebAssembly runtime embedded in Godot game engine projects. Interact with Wasm modules from GDScript. Accessing Wasm modules via GDScript provides the following benefits. - Sandboxed environment allows safely loading zero-trust mods/extensions to a project. - Single target means that Wasm modules can be built from any language e.g. Rust, Go, AssemblyScript and the single binary can be run on all platforms. - Fast execution compared to GDScript allows for offloading compute-heavy operations or running bots/mods/etc. at high FPS. This might be useful for loading mods, bot AI,…
In plain words
This is a WebAssembly runtime integrated into the Godot game engine that allows developers to call Wasm modules from GDScript. It enables safe loading of untrusted mods in a sandboxed environment, supports multiple programming languages like Rust and Go with a single compiled binary across all platforms, and offers faster execution for compute-intensive tasks compared to GDScript. It is useful for game developers wanting to add modding support, run bot AI, or offload heavy processing without writing C++ extensions.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
A WebAssembly runtime embedded in Godot game engine projects. Interact with Wasm modules from GDScript. Accessing Wasm modules via GDScript provides the following benefits. - Sandboxed environment allows safely loading zero-trust mods/extensions to a project. - Single target means that Wasm modules can be built from any language e.g. Rust, Go, AssemblyScript and the single binary can be run on all platforms. - Fast execution compared to GDScript allows for offloading compute-heavy operations or running bots/mods/etc. at high FPS. This might be useful for loading mods, bot AI, or entire games (similar to the WASM-4 fantasy console), offloading compute-heavy tasks without using GDExtention C++, or just writing some game logic in your favourite Wasm-supported programming language. Supports Wasmtime, Wasmer, and other runtimes that adhere to the Wasm C API. Basic function and global access, memory operations via the standard StreamPeer interface, and limited WASI support. Installable for both Godot 3 and Godot 4 as a GDExtension/GDNative addon or as engine module. Happy to hear feedback and/or receive PRs!
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