Use C# code to enable optimization settings

You can use code to enable some of the optimizations recommended in Optimize your Web build. If you use code to configure these settings it can save you time having to manually set each of them individually.

Note: This script only works in Editor, not in builds.

Create a C# script to optimize your Web build

To use code to enable most of these optimizations at once in your Unity project settingsA broad collection of settings which allow you to configure how Physics, Audio, Networking, Graphics, Input and many other areas of your project behave. More info
See in Glossary:

1. Go to Assets > Create > C# Script.
2. Paste the following code into the script:

   var namedBuildTarget = NamedBuildTarget.WebGL;
   var buildOptions = BuildOptions.CompressWithLz4HC;
   
   // Set IL2CPP code generation to Optimize Size 
   PlayerSettings.SetIl2CppCodeGeneration(namedBuildTarget,         
                                          Il2CppCodeGeneration.OptimizeSize);
   
   // Set the Managed Stripping Level to High
   PlayerSettings.SetManagedStrippingLevel(namedBuildTarget,     
                                           ManagedStrippingLevel.High);  
   
   // Strip unused mesh components           
   PlayerSettings.stripUnusedMeshComponents = true;
   
   // Enable data caching
   PlayerSettings.WebGL.dataCaching = true;
   
   // Set the compression format to Brotli
   PlayerSettings.WebGL.compressionFormat = WebGLCompressionFormat.Brotli;
   
   // Deactivate exceptions
   PlayerSettings.WebGL.exceptionSupport = WebGLExceptionSupport.None;
   
   // Deactivate debug symbols
   PlayerSettings.WebGL.debugSymbolMode = WebGLDebugSymbolMode.Off;
   
   //Enable WebAssembly 2023 features
   PlayerSettings.WebGL.wasm2023 = true;           
   
   // Set Platform Settings to optimize for disk size (LTO)
   EditorUserBuildSettings.SetPlatformSettings(namedBuildTarget.TargetName, 
                                               "CodeOptimization",  
                                               "disksizelto"); 
   
   

3. Change the script to suit your project.
4. Attach your script to a GameObject.
5. Enter Play mode. Your various settings are updated.

To change the settings for Asset Import Overrides, refer to Build profile reference.

Additional resources

• Optimize your Web build

• Recommended Graphics settings to optimize your Web build

• Recommended Player settings to optimize your Web build

• Recommended Quality settings to optimize your Web build

• Optimize Web platform for mobile