Run more than one Roblox at the same time.

One small app. No install. Open it, then launch the game as many times as you want.

Download TinyAcc.exe

Free · Windows 10/11 · single file · source code on GitHub

How to use

1. Close Roblox completely.
2. Open TinyAcc. It will show Multi-instance: ON.
3. Launch Roblox as many times as you want.

FAQ

Windows says "unknown publisher".

Click More info → Run anyway. TinyAcc is a small unsigned utility. The full source code is public on GitHub so you can see exactly what it does.

What does TinyAcc actually do?

The game normally closes your first window when you open a second one. TinyAcc holds the small startup lock that triggers that, so extra windows stay open. It does not touch the game itself.

Why do I have to close Roblox first?

The first game window grabs the startup lock when it opens. TinyAcc has to be holding the lock before any game window starts. So, close everything, open TinyAcc, then launch.

It says "Roblox is already open".

Close all Roblox windows (check the taskbar), then click Retry in TinyAcc.