Launch Options in Fortnite: What Does It Mean?

Fortnite allows players to use Launch Options — special command-line parameters that can be set in the Epic Games Launcher. These options let you customize how the game starts, optimize performance, and even troubleshoot technical problems.

When used correctly, they can help you achieve higher FPS, reduce input lag, and improve overall stability.

Why Use Launch Options?

• 🔧 Performance optimization — squeeze out more FPS, especially on lower-end PCs.
• 🖥 Compatibility — fix issues with DirectX, drivers, or older hardware.
• 🚀 Faster startup — skip splash screens or unnecessary processes.
• 🛠 Troubleshooting — resolve crashes, freezes, or frame drops.

Common Fortnite Launch Options

Here are some of the most popular and useful launch options you can try:

• -USEALLAVAILABLECORES
• Forces Fortnite to utilize all available CPU cores, improving performance on multi-core processors.
• -NOSPLASH
• Skips the intro splash screen, making the game load faster.
• -HIGH
• Runs Fortnite with high priority, giving it more system resources for smoother gameplay.
• -dx11
• Forces the game to run on DirectX 11. Useful if your PC struggles with DirectX 12.
• -dx12
• Forces the game to run on DirectX 12, which can provide better performance and stability on modern GPUs.
• -fullscreen
• Launches the game directly in fullscreen mode (sometimes helps with FPS and input lag).

How to Set Launch Options in Fortnite

1. Open the Epic Games Launcher.
2. Go to your Library and locate Fortnite.
3. Click the three dots (…) next to Fortnite and select Manage.
4. Under Settings, find the checkbox Additional Command Line Arguments.
5. Enter the desired launch options (for example: -USEALLAVAILABLECORES -NOSPLASH).

Command-Line Arguments

Command-line arguments are the same thing as launch options: the Epic Games Launcher calls the field Additional Command Line Arguments. Whatever you type there is added to the command that starts Fortnite, every time it launches. You find it in two places: Library → … → Manage, or the launcher Settings → Fortnite.

• Format: each argument starts with a hyphen, and several arguments are separated by spaces.
• Official use: Epic's own help article uses this field when the rendering mode does not stay saved: -d3d12 -sm6 for DirectX 12 and -d3d12 -FeatureLevelEs31 for Performance mode. Normally you pick the rendering mode in Fortnite's video settings instead.
• Other flags: Epic does not publish a list of Fortnite arguments; most flags shared online are general Unreal Engine or community tips, and their effect on FPS is not proven. Add one at a time and compare.
• Undo: untick the checkbox or clear the field, and Fortnite starts with its normal settings again.

Troubleshooting with Launch Options

Launch options are not just about performance — they’re also useful for fixing issues.

• If Fortnite keeps crashing or freezing, try -dx11 to force DirectX 11.
• If your FPS is unstable on a new GPU, test -dx12.
• For network-related stutters, adjusting graphics load with certain launch options can help stabilize your ping.

Final Tips

• Not all launch options improve performance — experiment to see what works best for your setup.
• Always update your graphics drivers before testing new options.
• Combine launch options with in-game settings (like lowering shadows or disabling motion blur) for the best results.

By fine-tuning your launch options, you can significantly improve your Fortnite experience, whether that means higher FPS, fewer crashes, or smoother gameplay.