Compile to WebAssembly?

A next-generation language of the Web, compatible with any Browser and any Device, WebAssembly allows your code to breathe new life and be compiled into a standard Web application.

Compile to WebAssembly

Extend the life of Legacy Apps

With our conversion tools, you can extend the life of your legacy application by automatically converting it to HTML5/JavaScript/WebAssembly. Whether Java, C/C++ or Flash, we have a solution for you.

Future proof your technology

Web Applications are growing in complexity, and gradually replacing the role of desktop applications. Thanks to WebAssembly and our tools, you can future proof your applications by bringing them in whole or in part to the Web.

WebAssembly Experts

At Leaning Technologies we specialise in bringing your software to the browser. Compiled automatically, executed efficiently, fully client-side. Our team of WebAssembly and compiler experts are ready to help you on your next project.

Who we work with

Core benefits

Converting vs Rewriting



An efficient, automated process with more certain timelines.


Single code base

Keeping a single code base means avoiding code duplication and maintenance costs in the future.


No bug duplication

Writing code results inevitably in the creation of new bugs and issues. Reusing existing code means avoiding it.


Leveraging existing skills

Avoid having to double your team, by keeping on the project the persons that already made it great.

Using technology instead of man-power, to reduce costs and uncertainties.

Our products

Our custom built C++ to WebAssembly compiler


Our Java to WebAssembly / JavaScript compiler


Our solution to run Flash or x86 in modern browsers

The idea

Web as a platform


Browsers isolate the operating system through sandboxing and gatekeeping. Computation executes client-side on devices, ruling out any breach during data transmission.


No device- or operating system-dependent code to mantain. Targeting browsers allows to solve problems now and future-proof your application.


Browsers are exceptionally fast at executing code, and they keep improving. The WebAssembly standard is another big step in this direction, bringing browser applications close to native speed.

Recent news

Want to know more?

CheerpX for Flash now generally available

CheerpX for Flash, our HTML5 technology to extend the life of Flash applications, is now generally available.

CheerpJ 2.1 released

The latest major release of CheerpJ, our solution to convert Java to HTML5, is now avaiable. Now supporting WebAssembly!

Cheerp 2.6 released

The latest release of Cheerp, our C/C++ to WebAssembly and JavaScript compiler. Cheerp is the fastest, most optimized WebAssembly compiler on the market.