Web Player settings

Use Player settings to know how Unity buildsThe process of compiling your project into a format that is ready to run on a specific platform or platforms. More info
See in Glossary and displays your final Web application. For a description of the general Player settings, refer to Player settings.

To access Web Player settingsSettings that let you set various player-specific options for the final game built by Unity. More info
See in Glossary:

• From the Unity main menu, go to Edit > Project Settings > Player. The Player settings window appears.
• Select the Web tab to view the Web Player settings.

You can find documentation for the properties in the following sections:

• Resolution and Presentation
• Splash Image
• Other Settings
• Publishing Settings

Note: Although the Icon panel appears on the Web Player settings, there are no icon settings available because Web games don’t use icons.

For more information about Web Publishing Settings, refer to Web Building and Running.

Resolution and Presentation

Use the Resolution and Presentation section to customize the aspects of the screen’s appearance in the Resolution section.

Resolution

You can customize the screen mode and default size of the Web canvas element by editing the following options:

Setting	Function
Default Canvas Width	Set the width of the Web canvas element.
Default Canvas Height	Set the height of the Web canvas element.
Run In Background	Enable this option to allow your content to continue to run when the canvas or the browser window loses focus.

Web template

Select a template to use for your Web Project:

• The Default page is a simple white page with a loading bar on a grey canvas.
• The Minimal page has only the necessary boilerplate code to run the Web content.
• The PWA page has a Progressive Web AppA software application that’s delivered through the web. It uses certain browser features to create a user experience on par with a native application. More info
  See in Glossary including a web manifest file and service worker code.

You can use your own template to run your game in an environment similar to the finished game using the instructions in Using Web Templates.

Splash Image

Use the Virtual Reality Splash Image setting to select a custom splash image for XRAn umbrella term encompassing Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR) applications. Devices supporting these forms of interactive applications can be referred to as XR devices. More info
See in Glossary displays. For information on common Splash Screen settings, refer to Splash Screen.

Other Settings

This section allows you to customize a range of options organized into the following groups:

• Rendering
• Configuration
• Shader Variant Loading
• Optimization
• Stack Trace
• Legacy

Rendering

Use these settings to customize how Unity renders your game for the Web platform.

Setting		Function
Color Space		Choose what color space to use for rendering: Gamma or Linear. Refer to Linear rendering overview to know the difference between the two.
Auto Graphics API		Disable this option to manually pick and reorder the graphics APIs. By default this option is enabled, and Unity includes WebGL2.0, with WebGL1.0 as a fallback for devices where WebGL2.0 isn’t supported.
Static BatchingA technique Unity uses to draw GameObjects on the screen that combines static (non-moving) GameObjects into big Meshes, and renders them in a faster way. More info See in Glossary		Enable this option to use Static batching.
Dynamic BatchingAn automatic Unity process which attempts to render multiple meshes as if they were a single mesh for optimized graphics performance. The technique transforms all of the GameObject vertices on the CPU and groups many similar vertices together. More info See in Glossary		Check this box to use Dynamic Batching on your build (enabled by default).
Graphics Jobs		Enable this option to instruct Unity to offload graphics tasks (render loops) to worker threads running on other CPU cores. Use it to reduce the time spent in Camera.Render on the main thread, which is often a bottleneck. Note: This feature is experimental. It might not deliver a performance improvement for your project, and might introduce new crashes.
Texture compressionA method of storing data that reduces the amount of storage space it requires. See Texture Compression, Animation Compression, Audio Compression, Build Compression. See in Glossary format		Choose DXT, ETC2, or ASTC to set the texture compression3D Graphics hardware requires Textures to be compressed in specialized formats which are optimized for fast Texture sampling. More info See in Glossary format for the Web platform. For information on how to pick the right format, refer to Texture compression format overview and to learn how to create builds for desktop and mobile browsers from a script, refer to Texture Compression in Web.
Lightmap Encoding		Choose Low Quality, Normal Quality, or High Quality to set the lightmapA pre-rendered texture that contains the effects of light sources on static objects in the scene. Lightmaps are overlaid on top of scene geometry to create the effect of lighting. More info See in Glossary encoding. This setting affects the encoding scheme and compression format of the lightmaps. For more information, refer to Lightmaps: Technical information.
HDRhigh dynamic range See in Glossary CubemapA collection of six square textures that can represent the reflections in an environment or the skybox drawn behind your geometry. The six squares form the faces of an imaginary cube that surrounds an object; each face represents the view along the directions of the world axes (up, down, left, right, forward and back). More info See in Glossary Encoding		Choose Low Quality, Normal Quality, or High Quality to set the HDR Cubemap encoding. This setting affects the encoding scheme and compression format of the HDR Cubemaps.
Lightmap Streaming Enabled		Whether to use Mipmap Streaming for lightmaps. Unity applies this setting to all lightmaps when it generates them. Note: To use this setting, you must enable the Texture Mipmap Streaming Quality setting.
Streaming Priority		Set the priority for all lightmaps in the Mipmap Streaming system. Unity applies this setting to all lightmaps when it generates them. Positive numbers give higher priority. Valid values range from —128 to 127.
Frame Timing Stats		Enable this option to gather CPU/GPU frame timing statistics.
Virtual Texturing		Indicates whether to enable Virtual Texturing. Note: The Unity Editor requires a restart for this setting to take effect.
Shader Precision Model		Select the default precision of samplers and the definition of half used in shadersA program that runs on the GPU. More info See in Glossary. For more information, refer to ShaderPrecisionModel.
360 Stereo Capture		Indicates whether Unity can capture stereoscopic 360 images and videos. When enabled, Unity compiles additional shader variants to support 360 capture (currently only on Windows/OSX). When enabled, enable_360_capture keyword is added during the Stereo RenderCubemap call. Note that this keyword isn’t triggered outside the Stereo RenderCubemap function. For more information, refer to Stereo 360 Image and Video Capture.

Configuration

Property	Description
Scripting Backend	Choose the scripting backend you want to use. The scripting backend determines how Unity compiles and executes C# code in your Project.
	Mono	Compiles C# code into .NET Common Intermediate Language (CIL) and executes that CIL using a Common Language Runtime. For more information, refer to MonoA scripting backend used in Unity. More info See in Glossary.
	IL2CPP	Compiles C# code into CIL, converts the CIL to C++ and then compiles that C++ into native machine code, which executes directly at runtime. For more information, refer to IL2CPPA Unity-developed scripting back-end which you can use as an alternative to Mono when building projects for some platforms. More info See in Glossary.
API Compatibility Level	Choose which .NET APIs you can use in your project. This setting can affect compatibility with third-party libraries. However, it has no effect on Editor-specific code (code in an Editor directory, or within an Editor-specific Assembly Definition). Tip: If you are having problems with a third-party assembly, you can try the suggestion in the API Compatibility Level section below.
	.Net Framework	Compatible with the .NET Framework 4 (which includes everything in the .NET Standard 2.0 profile plus additional APIs). Choose this option when using libraries that access APIs not included in .NET Standard 2.0. Produces larger builds and any additional APIs available aren’t necessarily supported on all platforms. For more information, refer to Referencing additional class library assemblies.
	.Net Standard 2.1	Produces smaller builds and has full cross-platform support.
Editor Assemblies Compatibility Level	Select which .NET APIs to use in your Editor assemblies.
	.NET Framework	Compatible with the .NET Framework 4 (which includes everything in the .NET Standard 2.1 profile plus additional APIs). Choose this option when using libraries that access APIs not included in .NET Standard 2.1. Produces larger builds and any additional APIs available aren’t necessarily supported on all platforms. For more information, refer to Referencing additional class library assemblies.
	.NET Standard	Compatible with .NET Standard 2.1. Produces smaller builds and has full cross-platform support.
IL2CPP Code Generation	Defines how Unity manages IL2CPP code generation. Note: To use this, set Scripting Backend to IL2CPP.
C++ Compiler Configuration	Choose the C++ compiler configuration used when compiling IL2CPP generated code.
	Debug	Debug configuration turns off all optimizations, which makes the code quicker to build but slower to run.
	Release	Release configuration enables optimizations, so the compiled code runs faster and the binary size is smaller but it takes longer to compile.
	Master	Master configuration enables all possible optimizations, squeezing every bit of performance possible. For instance, on platforms that use the MSVC++ compiler, this option enables link-time code generation. Compiling code using this configuration can take significantly longer than it does using the Release configuration. Unity recommends building the shipping version of your game using the Master configuration if the increase in build time is acceptable.
Use incremental GC	Uses the incremental garbage collector, which spreads garbage collection over several frames to reduce garbage collection-related spikes in frame duration. For more information, refer to Automatic Memory Management.
Allow downloads over HTTP	Indicates whether to allow downloading content over HTTP. The default option is Not allowed due to the recommended protocol being HTTPS, which is more secure.
	Not Allowed	Never allow downloads over HTTP.
	Allowed in Development Builds	Only allow downloads over HTTP in development builds.
	Always Allowed	Allow downloads over HTTP in development and release builds.
Active Input Handling	Choose how to handle input from users.
	Input Manager (Old)	Uses the traditional Input settings.
	Input System Package (New)	Uses the Input system. This option requires you to install the InputSystem package.
	Both	Use both systems.

Shader Variant Loading

Use these settings to control how much memory shaders use at runtime.

Property	Description
Default chunk size (MB)	Sets the maximum size of compressed shader variant data chunks Unity stores in your built application for all platforms. The default is 16. For more information, refer to Shader loading.
Default chunk count	Sets the default limit on how many decompressed chunks Unity keeps in memory on all platforms. The default is 0, which means there’s no limit.
Override	Enables overriding Default chunk size and Default chunk count for this build target.
Chunk size (MB)	Overrides the value of Default chunk size (MB) on this build target.
Chunk count	Overrides the value of Default chunk count on this build target.

API Compatibility Level

You can choose your mono API compatibility level for all targets. Sometimes a 3rd-party .NET library uses functionality that’s outside of your .NET compatibility level. To understand what’s going on in such cases, and how to best fix it, try following these suggestions:

1. Install ILSpy for Windows.
2. Drag the .NET assemblies for the API compatilibity level that you are having issues with into ILSpy. You can find the problematic files under Frameworks/Mono/lib/mono/YOURSUBSET/.
3. Drag in your 3rd-party assembly.
4. Right-click your 3rd-party assembly and select Analyze.
5. In the analysis report, inspect the Depends on section. The report highlights anything that the 3rd-party assembly depends on, but that’s not available in the .NET compatibility level of your choice in red.

Script Compilation

Property	Description
Scripting Define Symbols	Sets custom compilation flags. For more details, refer to Platform dependent compilation.
Additional Compiler Arguments	Adds entries to this list to pass additional arguments to the Roslyn compiler. Use one new entry for each additional argument. To create a new entry, click Add (+). To remove an entry, click Remove (-). When you have added all desired arguments, click Apply to include your additional arguments in future compilations. Click Revert to reset this list to the most recent applied state.
Suppress Common Warnings	Indicates whether to display the C# warnings CS0169 and CS0649.
Allow ‘unsafe’ Code	Enables support for compiling ‘unsafe’ C# code in a pre-defined assembly (for example, Assembly-CSharp.dll). For Assembly Definition Files (.asmdef), click on one of your .asmdef files and enable the option in the Inspector window that appears.
Use Deterministic Compilation	Indicates whether to prevent compilation with the -deterministic C# flag. With this setting enabled, compiled assemblies are byte-for-byte the same each time they’re compiled. For more information, refer to C# Compiler Options that control code generation.

Optimization

Property	Description
Prebake Collision Meshes	Adds collision data to Meshes at build time.
Preloaded Assets	Sets an array of Assets for the player to load on startup. To add new Assets, increase the value of the Size property and then set a reference to the Asset to load in the new Element box that appears.
Strip Engine Code	Enable this option if you want the Unity Linker tool to remove code for Unity Engine features that your Project doesn’t use. This setting is only available with the IL2CPP scripting backend. Most apps do not use every available DLL. This option strips out DLLs that your app doesn’t use to reduce the size of the built Player. If your app is using one or more classes that would normally be stripped out under your current settings, Unity displays a debug message when you try to build the app.
Managed Stripping Level	Chooses how aggressively Unity strips unused managed (C#) code. When Unity builds your app, the Unity Linker process can strip unused code from the managed DLLs your Project uses. Stripping code can make the resulting executable smaller, but can sometimes remove code that’s in use. For more information about these options and bytecode stripping with IL2CPP, refer to ManagedStrippingLevel.
	Minimal	Use this to strip class libraries, UnityEngine, Windows Runtime assemblies, and copy all other assemblies.
	Low	Remove unreachable managed code to reduce build size and Mono/IL2CPP build times.
	Medium	Run UnityLinker to reduce code size beyond what Low can achieve. You might need to support a custom link.xml file, and some reflection code paths might not behave the same.
	High	UnityLinker will strip as much code as possible. This will further reduce code size beyond what Medium can achieve but managed code debugging of some methods might no longer work. You might need to support a custom link.xml file, and some reflection code paths might not behave the same.
Enable Internal Profiler (Deprecated)	This feature is deprecated and will be retired in a future version of Unity. Use the Profiler window instead (menu: Window > Analytics > Profiler). The Profiler collects application performance data and prints a report to the console. The report contains the number of milliseconds each Unity subsystem takes to execute on each frame, averaged across 30 frames.
Vertex Compression	Sets vertex compression per channel. This affects all the meshes in your project. Typically, Vertex Compression is used to reduce the size of mesh data in memory, reduce file size, and improve GPU performance. For more information on how to configure vertex compression and limitations of this setting, refer to Compressing mesh data.
Optimize Mesh Data	Enable this option to strip unused vertex attributes from the mesh used in a build. This option reduces the amount of data in the mesh, which can help reduce build size, loading times, and runtime memory usage. Warning: If you have this setting enabled, don’t change material or shader settings at runtime. For more information, refer to PlayerSettings.stripUnusedMeshComponents.
Texture Mipmap Stripping	Enables mipmap stripping for all platforms. It strips unused mipmap levels from Textures at build time. Unity determines unused mipmap levels by comparing the mipmap level against the quality settings for the current platform. If a mipmap level is excluded from every quality setting for the current platform, then Unity strips those mipmap levels from the build at build time. If QualitySettings.globalTextureMipmapLimit is set to a mipmap level that has been stripped, Unity will set the value to the closest mipmap level that hasn’t been stripped.

Stack Trace

Select the logging settings for the Web platform.

Select your preferred stack trace method by enabling the option that corresponds to each Log Type (Error, Assert, Warning, Log, and Exception) based on the type of logging you require. For more information, refer to stack trace logging.

Property	Description
None	No logs are ever recorded.
ScriptOnly	Logs only when running scriptsA piece of code that allows you to create your own Components, trigger game events, modify Component properties over time and respond to user input in any way you like. More info See in Glossary.
Full	Logs all the time.

Legacy

Enable the Clamp BlendShapes (Deprecated) option to clamp the range of blend shape weights in Skinned Mesh Renderers.

Publishing settings

Use the Publishing Settings to configure how Unity builds your Web platform application. For example, you can choose to enable the browser cache to store its files in your build.

Property		Description
Compression Format		Choose the compression format to use for release build files. The options are: Gzip, Brotli, and Disabled (none). This option doesn’t affect development buildsA development build includes debug symbols and enables the Profiler. More info See in Glossary.
Name Files As Hashes		Enable this option to use an MD5 hash of the uncompressed file contents as a filename for each file in the build.
Data caching		Enable this option to automatically cache your contents Asset data on the user’s machine so it doesn’t have to be re-downloaded on subsequent runs (unless the contents have changed). Caching is implemented using the IndexedDB API provided by the browser. Some browsers might implement restrictions around this, such as asking the user for permission to cache data over a specific size.
Debug Symbols		Select from the available options to specify how debug symbols are added in your build.
	Off	Select this option if you don’t want any debug symbols to be added in your build.
	External	Select this option to store the debug symbols to in a separate file that you can download from the server when an error occurs. It’s recommended to choose this option for release builds.
	Embedded	Select this option to embed the debug symbols in a WASM file. This option helps preserve debug symbols and perform demangling (displaying the original function names) of the stack trace when an error occurs. By default, demangling support is available for this option.
Decompression Fallback		Include decompression fallback code for build files in the loader. Use this option if you are unable to configure server response headers according to the selected compression method.
Power Preference		Choose the GPU configuration to use for the Web platform build in multi GPU systems. The options are: Default, Low Power, and High Performance.

WebAssembly Language Features

Use this section to customize the WebAssembly language features for your Web application.

Property		Description
Enable Exceptions		Choose how to handle unexpected code behavior (generally considered errors) at runtime. The options are: None, Explicitly Thrown Exceptions Only, Full Without Stacktrace, and Full With Stacktrace. For more information, refer to Building and running a Web project.
Enable Native C/C++ Multithreading		Enable this option to use the native Unity C/C++ engine code which targets WebAssembly/SharedArrayBuffer multithreading (experimental). This won’t enable multithreading C# code, as that requires further advances to the WebAssembly language standard. It’s recommended to disable this option and use it only for evaluating future web features.
Enable WebAssembly 2023		If enabled, the generated WebAssembly code targets WebAssembly 2023, which is a Unity-coined name for a selection of newer WebAssembly language features. These features include: sign-extension opcodes, non-trapping fp-to-int instructions, bulk memory, JS BigInt integration, WebAssembly.Table, native WebAssembly exceptions, and SIMD (requires Chrome ≥ 91 (May 2021), Firefox ≥ 89 (June 2021) or Safari ≥ 16.4 (March 2023)). If disabled, targets the original WebAssembly MVP feature setA feature set is a collection of related packages that you can use to achieve specific results in the Unity Editor. You can manage feature sets directly in Unity’s Package Manager. More info See in Glossary.
Use WebAssembly.Table		Enable this option if you want the Web build to target the WebAssembly.Table language feature for faster JS-Wasm interop and build times. When this option is disabled, the Web build targets the older deprecated Emscripten -sDYNCALLS model for backwards compatibility with older Unity Web JS plug-ins. It’s recommended to enable this option for new projects that don’t use any old incompatible JavaScript plug-ins, and to disable it if you’re using .jslib files that rely on the old dynCall() mechanism. Note: WebAssembly.Table isn’t backwards compatible. When targeting WebAssembly.Table, use the Emscripten runtime function getWasmTableEntry(functionPtr) to convert a function pointer to a callable JS function, or the Emscripten code template {{{ makeDynCall('sig', 'variableName') }}}(...args); to make a function pointer call. The earlier Emscripten runtime function family dynCall_sig(ptr, ...args); is no longer supported with WebAssembly.Table. For code examples, refer to the Emscripten documentation.
Enable BigInt		Enable this option to target the WebAssembly.BigInt language feature and use the BigInt type in WebAssembly, which results in faster build times and slightly smaller code size. When this option is disabled, the BigInt type isn’t available in WebAssembly. The generated WebAssembly code relies on the BigInt ABI for function signatures containing 64-bit variables. Disable this option if you want to target old browsers that don’t support the Wasm BigInt feature. It’s recommended to enable this option for new projects, fast build iteration times, and to disable it if targeting backward compatibility with older browsers is important. Note: The Wasm BigInt feature requires at least Chrome 85 (Aug 25, 2020), Firefox 78 (Jun 30, 2020), Safari 14.5 (Apr 26, 2021), or newer.
Initial Memory Size		The initial size of the WASM heap memory in megabytes (MB). By default, this is set to 32 MB. If Memory Growth Mode is set to None, then this is also the maximum size of WASM heap memory.
Memory Growth Mode		Choose the growth mode for the WASM heap memory from the following options. The recommended option is Geometric.
	None	The WASM heap memory has a fixed size configured in Initial Memory Size.
	Linear	The WASM heap memory increases by a fixed amount configured by Linear Memory Growth Step.
	Geometric	The WASM heap memory increases relative to the current heap size depending on the factor configured in Geometric Memory Growth Step and Geometric Memory Growth Cap.
Maximum Memory Size		The maximum size of the WASM heap memory in MB. By default, this is set to 2048 MB, which is the recommended setting. You can enter a memory size up to 4098MB, but there are known Firefox and Chrome bugs for builds above 2048 MB. This option is only available for the Memory Growth Mode Linear or Geometric.
Power Performance		Helps you determine the performance mode that’s ideal for your GPU configuration in a multi-GPU systems environment for a Web platform implementation. Select the best GPU configuration for your Web build:
	Default	Select Default if you want the Web platform implementation to use its default behavior.
	Low Performance	Select Low Performance if you want the Web platform implementation to prioritize power savings.
	High Performance	Select High Performance, if you want the Web implementation to prioritize rendering performance.
Linear Memory Growth Step		Advanced tuning option to control the WASM heap growth step in MB. By default, this is set to 16 MB. A growth step of 16MB indicates that the heap is increased by 16MB each time it needs to grow. Only available if Memory Growth Mode is set to Linear.
Geometric Memory Growth Step		Advanced tuning option to control the WASM heap growth factor relative to the current heap size. By default, this is set to 0.2. A growth factor of 0.2 means that the size of the heap is increased by 0.2 * currentHeapSize each time the heap needs to grow. Only available if Memory Growth Mode is set to Geometric.
Geometric Memory Growth Cap (MB)		Advanced tuning option to control the upper limit for a heap growth step in MB. By default, this is set to 96 MB. A growth cap of 96MB means that the size of the heap is increased by at most 96 MB. Only available if Memory Growth Mode is set to Geometric.

Show Diagnostic Overlay setting

To help optimize Web builds and diagnose potential problems, you can view diagnostics information (currently limited to memory usage) by enabling this setting. Once enabled, an icon appears on the build that displays an overlay with data about the build. It’s available for both Development and Release builds.

1. To view the diagnostics information, enable the Show Diagnostics Overlay option in the Player settings window (File > Build Settings > Player Settings > Publishing Settings).

   On desktop, the Diagnostics icon appears on the footer of the Web canvas:

   

   On a mobile device, the Diagnostics icon appears on the bottom-right of the screen:

   

2. Click the Diagnostics icon. An overlay appears showing the JavaScript memory, which is further broken down to display WASM heap memory usage:

The following diagnostics appear on the overlay screen:

Property		Function
Total JS Memory		The current size of the JavaScript (JS) heap, including unused memory not allocated to any JS objects in megabytes.
	Used JS Memory	Memory in use by JS objects in megabytes.
Total WASM heap memory		Linear memory representing the entire heap of the C/C++ Unity engine that’s compiled with Emscripten, including unallocated memory in megabytes.
	Used WASM heap	The space of the WASM heap that’s allocated in megabytes.
Page Load Time to First Frame		The total time from the beginning of page load until the first application frame rendering is complete in milliseconds.
	Page Load Time	The time it takes from page load to get to the beginning of rendering the first frame, including downloads, compilation, parsing, and the main application in milliseconds.
	Code download time	The time it takes for the build to download the code file in milliseconds.
	Load time of asset file(.data)	The time it takes for the build to download the .data file binary, in milliseconds.
	WebAssembly startup time	The time it takes between loading the JavaScript framework and reaching Unity’s C++ main(). This is close to compilation time of WASM, in milliseconds.
	Game startup time	The time it takes to finish executing Unity’s C++ main() to the first frame of main, which typically contains the loading of the first game sceneA Scene contains the environments and menus of your game. Think of each unique Scene file as a unique level. In each Scene, you place your environments, obstacles, and decorations, essentially designing and building your game in pieces. More info See in Glossary in milliseconds.
Average FPSSee first person shooter, frames per second. See in Glossary (10 seconds)		The average of last 10 frames per secondThe frequency at which consecutive frames are displayed in a running game. More info See in Glossary.
	Current frames per second	The number of frames rendered on screen per second.
Number of Frame Stalls		The number of rendered frames that took unusually long to complete compared to their previous frames.

Important note about JS Memory

The JS Memory information is obtained using the performance.memory API, which is currently only supported on Chrome or Edge. There are no other APIs available that return this information for Safari or Firefox.

Note: The performance.memory API isn’t supported on iOS devices.

On browsers where this API isn’t supported, a message showing N/A appears.

Additional resources:

• Texture Compression in Web
• Using Web Templates
• Splash Screen
• Texture compression format overview
• Texture compression format override

PlayerSettingsWebGL