bytecodealliance/javy

Health v2 · maintenance only

Adoption not part of the score

2734 stars · 135 forks observed · 2026-08-28

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

Javy is a JavaScript-to-WebAssembly toolchain that compiles JavaScript source into small Wasm modules executed in an embedded JS runtime. It ships as a Rust CLI and integrates with Wasm engines like Wasmtime.

Use cases

• compile javascript to webassembly
• run js in wasmtime
• build small wasm modules from javascript
• deploy javascript as wasm serverless functions
• execute javascript in a wasm sandbox
• create wasm binaries from node scripts

When to choose

• you want to run JavaScript inside WebAssembly runtimes like Wasmtime or WASI environments
• you need tiny Wasm modules (1-16 KB with dynamic linking) for plugins or edge/serverless workloads
• you want sandboxed, portable execution of JS code

When to avoid

• you need full Node.js APIs or npm ecosystem compatibility at runtime
• you want browser-targeted JavaScript bundling rather than WASI Wasm output
• your project requires DOM or native module access

Facets

cli-tool · maturity active

compiler wasm cli interpreter build-tool developer-tools compilers web-development cross-platform cli wasm rust windows javascript webassembly quickjs wasm-toolchain serverless-wasm bytecode-alliance linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="bytecodealliance/javy")