The HTML5LaunchHelper.exe program will launch a web server which is configured to serve compressed files on localhost. Once the project has finished being packaged, open the folder the project was packaged to and run the HTML5LaunchHelper.exe program. Select a folder for the project to be saved and then click Select Folder to start the packaging process. To create a packaged HTML5 project that can be deployed to the web, you will need to make sure to do the following.įirst, go to File > Package Project and select HTML5 from the list. Then from the from the displayed menu, select the browser you wish to use by clicking on it. You can do this by going to the Main Tool Bar and clicking on the Advanced options dropdown next to the Launch option. Once you have installed one of the compatible web browsers you can then test one of your HTML5 project. You can find more information about building your project for Shipping in the Readme.txt file that is generated when your project is built. In Order to get your UE4 powered HTML5 project working correctly you will need to disable MSAA from the

In Firefox nightly, SharedArrayBuffer can be enabled in about:config by setting the _memory preference to true. Alternately, these can be enabled and disabled in chrome://flags/#enable-webassembly-threads as 'WebAssembly threads support'. In Chrome: launch with the following flags: -js-flags=-experimental-wasm-threads -enable-features=WebAssembly,SharedArrayBuffer. Some browsers will need special flags enabled to be allowed to run in multithreaded mode. You can find 64-bit versions of the Google Chrome and Firefox web browsers using the following linksĮxperimental multithreaded support is available using UE4 builds built from source. While you can run your UE4 HTML5 project with 32-bit web browser, using a 64-bit version web browser is highly recommended. This means that you can start creating HTML5 projects without having to perform any additional setup steps or install any additional software. When you download UE4 from either the Epic Games Launcher or from Epic's Github repository all of the needed Emscripten and Python files for HTML5 development will be included. The Unreal Engine 4 (UE4) HTML5 implementation utilizes the Emscripten toolchain from Mozilla to cross-compile UE4's C++ code into Javascript.

Html5 compiler