Learn EMSCRIPTEN with Real Code Examples

Bring desktop games to web platform

Deliver computationally intensive apps to browsers

Enable SaaS tools with high-performance browser modules

Reduce need for native app installation

Distribute legacy software to wider audience

Improved WebAssembly SIMD and multithreading support

Better debugging and source map support

Enhanced integration with modern web APIs

Faster compilation and smaller output sizes

Support for additional LLVM languages beyond C/C++

Applications not using C/C++ code

Web apps that don’t require high-performance native code

Projects needing server-side execution instead of browser runtime

Tasks heavily reliant on database or backend services

Code requiring OS-level resources unavailable in browser sandbox

Emscripten is a compiler that converts C/C++ code into WebAssembly for the web.

Enables near-native performance in browsers and integration with web APIs.

Supports multimedia, graphics, and computationally intensive applications.

Provides virtual filesystem and runtime emulation for native code.

Ideal for porting legacy applications, games, and high-performance web apps.

Is Emscripten free?

Yes - it is open-source and free to use

What languages are supported?

Primarily C and C++, with partial support for other LLVM languages

Does Emscripten work in all browsers?

Works in modern browsers with WebAssembly support; asm.js fallback for older browsers

Can I use multithreading?

Yes, if the browser supports WebAssembly threads and SharedArrayBuffer

How do I debug Emscripten code?

Use browser developer tools, source maps, and logging; inspect JS glue code