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Use C# code to enable optimization settings

Use a C# script to enable some optimization settings.
Read time 2 minutesLast updated 13 days ago
You can use code to enable some 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 the Unity 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 settings:
  1. Create an 
    Assets/Editor
    folder if you don't already have one.
  2. Create an empty C# script in the 
    Editor
    folder.
  3. Paste the following code into the script:
    using UnityEditor;using UnityEditor.Build;using UnityEngine;public class WebOptimizer{    [MenuItem("Example/Optimize")]    public static void Optimize()    {        var namedBuildTarget = NamedBuildTarget.WebGL;        // 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)        UnityEditor.WebGL.UserBuildSettings.codeOptimization = UnityEditor.WebGL.WasmCodeOptimization.DiskSizeLTO;    }}
  4. Change the script to suit your project.
  5. From the toolbar, select Example > Optimize to run the script. Your settings update.
To change the settings for Asset Import Overrides, refer to Build profile reference.

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