# emscripten-core/emscripten

Emscripten: An LLVM-to-WebAssembly Compiler

Repository: https://github.com/emscripten-core/emscripten
Canonical: https://ross.abutalabs.com/products/emscripten
Language: C++
License: NOASSERTION
License Family: other
Topics: hacktoberfest, emscripten, wasm, webassembly
Last push: 2026-08-26T16:56:07+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 5681, "days_push": 7, "days_rel": 13, "gap_med": 10.0, "n_releases_24m": 9}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 27574, forks 3538 (observed 2026-08-28T04:11:47.836139+00:00)

## What it is
Emscripten is an LLVM-to-WebAssembly compiler toolchain that compiles C and C++ (and other LLVM-based languages) to run on the Web, Node.js, and standalone wasm runtimes. It provides Web support for portable APIs like OpenGL and SDL2, enabling complex native applications such as game engines to be ported to the browser.

## Use cases
- compile c++ to webassembly
- port a native game to the browser
- run c code in node.js
- build webassembly from rust
- port an opengl sdl2 app to the web
- generate html page from c source

## When to choose
- you need to run existing C/C++ codebases in the browser
- you want WebAssembly output with JavaScript glue and HTML generation
- you rely on portable APIs like OpenGL or SDL2 in a web target

## When to avoid
- you are writing a new web project from scratch in JavaScript or TypeScript
- you target native platforms only
- you need minimal wasm output without a JS runtime layer

## Facets
- artifact type: cli-tool
- maturity: active
- function: compiler, wasm, developer-tools
- domain: compilers, web-development, cross-platform
- platform: windows, wasm, browser, cli
- tags: webassembly, llvm, c-plus-plus, emscripten, porting, linux, macos, nodejs

## Member repositories
- emscripten-core/emscripten (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:47.836139+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 2026-08-30T07:20:52.793020+00:00, confidence not recorded.
  - readme: https://github.com/emscripten-core/emscripten (fetched 2026-08-28T04:11:47.836139+00:00, sha 16bae2690f0d)
- Data as of 2026-08-30T08:39:29.467469+00:00.