Unity Web games and experiences can run in desktop Chrome on Windows, macOS, and Linux when the browser supports WebGL 2, HTML5, 64-bit browsing, and WebAssembly. If a compatible browser still cannot load a build, the problem may be how that build is hosted—especially its compression or response headers. This guide covers both cases. It refers to Unity Web content, not running the Unity Editor inside Chrome.
First, identify what is failing
There are two places to check: the browser and device opening the page, or the build’s delivery from its host server. If you are visiting a game, start with browser compatibility. If you made the build, check its publishing settings and the server’s HTTP response headers.
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If you are trying to open a Unity game
Check Chrome and device compatibility
Unity 6.0 lists Google Chrome as supported on desktop Windows, macOS, and Linux, provided the browser is WebGL 2 capable, complies with HTML5 standards, is 64-bit, and supports WebAssembly. See Unity’s Web browser compatibility documentation.
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Unity 6.0 separately lists Chrome 58 and newer for Android. That browser threshold does not mean every Unity Web project will perform well on every phone; project demands and device capabilities still matter.
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If the page still fails
If Chrome meets the requirements but the experience does not load, record the exact error and whether the experience is embedded in another page or opened directly. Those details help distinguish a browser issue from a problem with the particular build or its hosting. The compatibility requirements alone cannot identify the cause of an individual failure, and they do not establish that new hardware is needed.
If you made the Unity Web build
A compatible browser cannot compensate for a server that delivers the build incorrectly. Unity’s deployment guidance says the server must return appropriate response headers so the browser can process the downloaded files. Check the selected compression format in Unity’s Web publishing settings, then compare it with the server’s actual responses.
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Match compression to the response header
For gzip-compressed files, the server should return Content-Encoding: gzip. For Brotli-compressed files, it should return Content-Encoding: br. Unity notes that Chrome supports Brotli natively over HTTPS, so use HTTPS when relying on Chrome’s native Brotli support. The encoding reported by the server must match the file’s compression; a mismatch can prevent the browser from handling the build correctly.
Set the WebAssembly MIME type
For WebAssembly streaming compilation, Unity says WebAssembly files should be served with Content-Type: application/wasm. Check the response for the .wasm file rather than assuming the server is sending the correct type.
Consider Decompression Fallback only when needed
Unity documents Decompression Fallback as an option when you cannot configure the server appropriately or are less experienced with server configuration. It can make a build work without the expected server-side decompression handling, but the tradeoff is a larger loader and less efficient loading. It is not a substitute for correct headers when you can configure the host. Unity also notes that WebAssembly streaming does not work together with JavaScript decompression when Decompression Fallback is enabled.
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Before concluding that Chrome or Unity is at fault, gather the information needed to isolate the problem:
- Unity version and Web build settings, including compression format and whether Decompression Fallback is enabled.
- Hosting URL and protocol, plus the response headers for the compressed build files and the
.wasmfile. - Chrome version and operating system, and the exact browser-console error.
- Whether the experience is embedded or loaded directly.
Unity’s Deploy a Web application documentation describes the relevant hosting and response-header requirements. These checks can narrow the issue, but a specific diagnosis depends on the failed build and its actual browser and server responses.
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