bytecodealliance/wit-bindgen

Health v2 · maintenance only

Adoption not part of the score

1468 stars · 297 forks observed · 2026-10-09

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A suite of bindings generators that produce guest-language bindings from WIT (WebAssembly Interface Types) files for the WebAssembly Component Model. It supports Rust, C, C++, C#, and Go programs compiled to WebAssembly.

Use cases

• generate rust bindings for wit interface definitions
• compile a rust library to a webassembly component
• build a wasi component with typed imports and exports
• create c or go bindings for the component model
• define a plugin api for a wasm host using wit
• turn a core wasm module into a component

When to choose

• you are authoring guest programs compiled to webassembly and want type-safe bindings from wit files
• you are building components for wasmtime or other component-model hosts
• you want to share interface definitions across rust, c, c++, c#, or go wasm guests

When to avoid

• you need host-side bindings to execute components - use wasmtime or a host-specific tool instead
• your guest language is not rust, c, c++, c#, or go and has no third-party generator
• you are targeting core wasm modules without the component model

Facets

library · maturity active

wasm serialization sdk developer-tools compilers cross-platform rust cpp c go wasm cli wit component-model wasi bindings-generator guest-programs idl bytecode-alliance code-generation webassembly

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