WebAssembly/WASI

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

5783 stars · 330 forks observed · 2026-08-28

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

WASI (WebAssembly System Interface) is a set of standardized APIs that let WebAssembly modules access system resources like files, clocks, and sockets outside the browser. This repository hosts the standards discussion, proposal process, and documentation for the WASI Subgroup of the WebAssembly Community Group.

Use cases

• run webassembly modules outside the browser with system access
• sandbox untrusted code with capability-based system APIs
• port posix-style programs to webassembly
• build cross-platform plugins using wasm components
• standardize system interfaces for wasm runtimes

When to choose

• you need a standardized, portable system interface for WebAssembly runtimes
• you want capability-based sandboxing for untrusted wasm code
• you are building or targeting wasm component-model applications

When to avoid

• you need a concrete runtime implementation rather than API specifications
• you need full POSIX compatibility - WASI is a subset with different semantics
• your code only runs in browsers where WASI is unnecessary

Facets

library · maturity active

wasm sdk api-framework web-development developer-tools operating-systems cross-platform wasm cross-platform windows wasi system-interface webassembly-standards component-model wit posix-like-apis sandboxing linux macos

Member repositories

For agents

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