Emscripten Compiler Frontend (emcc)Emcc is used to call the Emscripten compiler from the command line. It is effectively a drop-in replacement for a standard compiler like gcc or clang.
Emscripten SDK (emsdk):
Emsdk is used to perform all SDK maintenance. You can use it to download, install, activate, and remove SDKs and tools, and even to build and use the latest compiler from source on GitHub.