You can open more than one Roblox game window on the same computer, but the method depends on whether you're using the official Roblox launcher or a web browser

The simplest way is to open Roblox in your web browser (like Chrome or Firefox) in one window, then open the Roblox launcher process in a separate window at the same time. Your computer will run both. If you want two browser windows instead, you can open a new browser tab or window and join a different game — most browsers let you run multiple Roblox tabs without trouble, though your computer's speed will slow down the more windows you add.

The official Roblox launcher (the app you read from roblox.com) normally closes any other Roblox launcher window when you open it, so you can't easily run two launcher windows side by side. But you can run one launcher window and one browser window at the same time without that conflict.

Key Takeaways

  • Opening Roblox in a browser tab and the Roblox launcher app at the same time works on most computers without extra steps.
  • Two browser windows or tabs can both run Roblox games, but your computer will slow down if both games are active at once.
  • The official launcher will close other launcher windows, so you cannot run two launcher instances side by side.
  • Your computer's RAM and processor speed determine how many windows you can run smoothly — older or lower-spec machines may lag with two active games.

Opening the browser and launcher at the same time

This is the easiest method and works on Windows, Mac, and Linux. Open your web browser first and go to roblox.com. You can play a game in the browser window if you want, or just leave it open. Then open the Roblox launcher process separately — it will start in its own window without closing the browser.

Both windows will run independently. You can play a game in the browser window, then switch to the launcher window and play a different game. Your computer will handle both as long as you have enough RAM (memory). If your computer has 8 GB of RAM or more, you should be fine. If you have 4 GB or less, you may notice slowness or lag in both games.

Running two browser windows or tabs

If you prefer to stay in your browser, you can open two separate browser windows or use two tabs in the same window. Open your first Roblox game in one tab, then right-click the Roblox website link and select "Open in New Tab" or "Open in New Window" to start a second game.

Most modern browsers (Chrome, Firefox, Edge, Safari) support this without crashing. However, running two active Roblox games in the same browser uses more memory and processing power than one game alone. If you switch between tabs instead of playing both games at the same time, your computer will handle it better because only one game is actually running at any moment.

Why your computer might slow down with multiple windows

Each Roblox game window uses RAM and CPU (processor) power. When you open two windows, your computer is doing twice the work. Graphics rendering, physics calculations, and network data all happen in both windows at once. Older computers or those with limited RAM will struggle first.

If you notice lag, stuttering, or freezing when you open a second window, close one of the games and try again. You can also check your computer's task manager (Windows) or Activity Monitor (Mac) to see how much memory Roblox is using. If both windows together are using more than 75% of your available RAM, that's usually where problems start.

Differences between the launcher and browser versions

The Roblox launcher is a dedicated process that some players prefer because it can feel slightly faster and handles updates automatically. The browser version runs Roblox through your web browser and doesn't require a separate read. Both play the same games, but they use different amounts of memory and may perform differently on your specific computer.

If you're running one launcher window and one browser window, the launcher usually performs better because it has direct access to your graphics card. The browser version has to share resources with your browser's other tabs and extensions. If you have many browser tabs open, closing some of them before opening a second Roblox window will free up memory.

What to do if one window closes when you open another

If you're trying to open two launcher windows and the first one closes, that's normal — the launcher is designed to prevent multiple instances. Switch to the browser method instead: keep the launcher open and open roblox.com in your browser for the second window.

If a browser window closes unexpectedly, it's usually because your computer ran out of available memory. Close other applications (like Discord, YouTube, or email) to free up RAM, then try opening the second Roblox window again. You can also try using a different browser if one is consistently crashing — sometimes one browser uses memory more efficiently than another on your particular computer.

Frequently Asked Questions

Will Roblox ban me for running two windows at once?

No. Running multiple Roblox windows is not against Roblox's terms of service. However, using automation tools or scripts to control multiple accounts at once is against the rules. Playing two separate games in two windows with your own hands is fine.

Can I run two Roblox games on the same account in different windows?

Yes, but only one window will stay logged in. When you log into the same account in a second window, the first window will log out. If you want to play two games at once, you need either two different accounts or one account in the browser and one in the launcher.

How much RAM do I need to run two Roblox windows smoothly?

8 GB of RAM is the practical minimum for smooth gameplay in two windows at once. With 4 GB, you'll likely experience lag. With 16 GB or more, you should have no trouble. Close other applications before opening the second window to free up memory.

Why is my second Roblox window so slow?

Your computer is sharing its processing power and memory between two games. Check your task manager to see how much RAM is available. If you're using more than 80% of your total RAM, close the second window or other applications. Older graphics cards also struggle with two games at once.

Can I run Roblox on two monitors at the same time?

Yes. Open one Roblox window on each monitor using the same methods described above — browser and launcher, or two browser windows. Your computer will treat them as separate windows even though they're displayed on different screens. Performance depends on your RAM and processor, not on how many monitors you have.