Cheerp is an open-source, permissively licensed, enterprise-grade C/C++ compiler for Web applications. It compiles virtually any C/C++ code to WebAssembly and JavaScript.

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What is Cheerp?

Cheerp is a C/C++ compiler to WebAssembly and JavaScript, based on and integrated into the LLVM/Clang infrastructure, and featuring numerous custom optimisation steps to maximise performance and minimise size of the compiled JavaScript/WebAssembly output. Thanks to this, Cheerp is the best performing, most optimised C++ to WebAssembly compiler available on the market.

Cheerp is used primarily to port existing C/C++ libraries and applications to HTML5, but can also be used to write high-performance Web applications and WebAssembly components from scratch. Using Cheerp, C/C++ code gets compiled into JavaScript/WebAssembly and optimised, with the right JavaScript interfaces being exposed, and can easily be integrated in a web application.

Repository structure

This repository (cheerp-meta) holds Cheerp's npm packages and tracks Cheerp issues.

Other repositories hold various components of Cheerp:

• cheerp-compiler - primary
• cheerp-musl
• cheerp-utils
• cheerp-libs

Licensing

Cheerp is licensed under the Apache 2.0 License with LLVM exceptions, i.e. the same license of upstream LLVM/Clang. It is actively developed and maintained by Leaning Technologies. Commercial support, feature fast tracking, sponsored development and consulting packages are available for Enterprise customers.