|  |
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| [](https://circleci.com/gh/emscripten-core/emscripten/tree/master) |
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| Main project page: <http://emscripten.org> |
| |
| Overview |
| -------- |
| |
| Emscripten compiles C and C++ to [WebAssembly](https://webassembly.org/) using |
| [LLVM](https://en.wikipedia.org/wiki/LLVM) and |
| [Binaryen](https://github.com/WebAssembly/binaryen/). Emscripten output can run |
| on the Web, in Node.js, and in |
| [wasm runtimes](https://v8.dev/blog/emscripten-standalone-wasm#running-in-wasm-runtimes). |
| |
| Emscripten provides Web support for popular portable APIs such as OpenGL and |
| SDL2, allowing complex graphical native applications to be ported, such as |
| the [Unity game engine](https://docs.unity3d.com/Manual/webgl-gettingstarted.html) |
| and [Google Earth](https://blog.chromium.org/2019/06/webassembly-brings-google-earth-to-more.html). |
| It can probably port your codebase, too! |
| |
| While Emscripten mostly focuses on compiling C and C++ using |
| [Clang](https://clang.llvm.org/), it can be integrated with other LLVM-using |
| compilers (for example, Rust has Emscripten integration, with the |
| `wasm32-unknown-emscripten` and `asmjs-unknown-emscripten` targets). |
| |
| License |
| ------- |
| |
| Emscripten is available under 2 licenses, the MIT license and the |
| University of Illinois/NCSA Open Source License. |
| |
| Both are permissive open source licenses, with little if any |
| practical difference between them. |
| |
| The reason for offering both is that (1) the MIT license is |
| well-known, while (2) the University of Illinois/NCSA Open Source |
| License allows Emscripten's code to be integrated upstream into |
| LLVM, which uses that license, should the opportunity arise. |
| |
| See `LICENSE` for the full content of the licenses. |
