# WAVM/WAVM

WebAssembly Virtual Machine

Repository: https://github.com/WAVM/WAVM
Canonical: https://ross.abutalabs.com/products/wavm
Homepage: https://wavm.github.io/
Language: C++
License: BSD-3-Clause
License Family: permissive
Last push: 2026-04-05T13:08:49+00:00

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 75, release rhythm 46, longevity 100
- inputs: {"age_days": 4030, "days_push": 150, "days_rel": 150, "gap_med": null, "n_releases_24m": 1}
- flags: prerelease_only
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2775, forks 233 (observed 2026-08-28T04:07:21.216263+00:00)

## What it is
WAVM is a WebAssembly virtual machine designed for non-browser applications, using LLVM to JIT-compile WebAssembly to near-native machine code. It supports WebAssembly 1.0 plus extensions like WASI, SIMD, threads, and exception handling, with sandboxing to isolate untrusted code.

## Use cases
- run webassembly modules outside the browser
- embed a wasm runtime in a native application
- sandbox untrusted code with webassembly
- execute WASI programs on the command line
- jit compile wasm to native code with llvm

## When to choose
- you need a fast, near-native WebAssembly runtime for server or embedded host applications
- you want WASI, SIMD, threads, or exception-handling support in a standalone VM
- you need to safely isolate plugin code inside a C++ application

## When to avoid
- you only need WebAssembly in a web browser
- you require strong protection against side-channel attacks like Spectre
- you need a 32-bit host runtime
- you need a lightweight interpreter rather than a JIT with an LLVM dependency

## Facets
- artifact type: library
- maturity: active
- function: interpreter, compiler
- domain: developer-tools, programming-languages, compilers
- platform: cpp, windows, cross-platform
- tags: webassembly, wasm-runtime, llvm-jit, wasi, virtual-machine, sandboxing, linux, macos

## Member repositories
- WAVM/WAVM (main) score 70

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:21.216263+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T08:16:33.571729+00:00, confidence not recorded.
  - readme: https://github.com/WAVM/WAVM (fetched 2026-08-28T04:07:21.216263+00:00, sha ad64b876fddd)
  - homepage: https://wavm.github.io/ (fetched 2026-08-29T09:55:46.039232+00:00, sha 76b5a50cc7cb)
- Data as of 2026-08-30T08:39:29.467469+00:00.