WebAssembly/binaryen

Health v2 · maintenance only

Adoption not part of the score

8612 stars · 881 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Binaryen is a compiler and toolchain infrastructure library for WebAssembly, written in C++, with a simple C API and JavaScript bindings. It parses, emits, interprets, and optimizes WebAssembly, and its wasm-opt optimizer is used by toolchains like Emscripten, wasm-pack, and Kotlin/Wasm.

Use cases

• optimize and minify webassembly binaries for size and speed
• compile a custom language to webassembly using a backend library
• convert webassembly to javascript with wasm2js
• parse, transform, and re-emit wasm modules in a build pipeline
• interpret webassembly modules for testing

When to choose

• you need wasm-specific optimizations beyond what general compilers provide
• you are building a compiler targeting webassembly and want a reusable backend
• you want to shrink or speed up wasm output from Emscripten, Rust, Kotlin, or Dart toolchains

When to avoid

• you need a general-purpose optimizer for native machine code rather than wasm
• you only need to run wasm, not compile or optimize it
• you want a high-level language runtime rather than a compiler infrastructure library

Facets

library · maturity stable

compiler build-tool developer-tools compilers web-development developer-tools cross-platform cpp cli webassembly wasm-opt optimizer compiler-backend toolchain emscripten nodejs

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markdown · JSON · MCP: product_card(name="WebAssembly/binaryen")