• is a x86 to WebAssembly virtualization technology

  • can virtualize native executables or full operating systems

  • can run any x86 application, fully client side

  • use case: running Flash content in the browser by virtualizing the Flash player

How is this possible?

CheerpX 101


Two-tiered execution engine

Interpreter that does code discovery + bookeeping to allow to efficiently pass hot code to the JIT.


in WebAssembly

CheerpX JIT engine, a WebAssembly module that compiles new Webassembly modules.


Emulate devices or system calls

CheerpX emulates system calls or device access using Web APIs and browser functions.


General purpose platform technology

CheerpX can be used to run single x86 application, or full systems.


Tell me more

We are working on CheerpX, but it's not yet available generally.
If you are curious and want to know more, stay tuned, or get in touch!

Contact us for more information
Recent news

Latest about CheerpX

CheerpX for Flash now generally available

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

Read article

CheerpX preview at WASM SF

Our Senior Developer Yuri gave a technical preview of CheerpX at the WebAssembly San Francisco Meetup at Cloudflare.

Watch the presentation

Extreme WebAssembly

CheerpX is probably the most complex Wasm application. Our point of view on capabilities and (current) limits of this technology