Install & Attach

Getting the client onto your machine, attached to Roblox, and ready to execute.

Requirements

Windows 10 or Windows 11. Windows 7 and 8 are not supported.
The 64-bit Roblox client — both the web version and the Microsoft Store (UWP) build work.
No runtime to install by hand. The installer pulls down everything it needs.

Installing

1
Run the installer
Download it from the site and run it. It fetches the current build and unpacks the client, the API and the workspace folder for you.
2
Let it finish updating
The client updates itself whenever Roblox changes, so the first launch after a Roblox update may sit on the update step for a moment.
3
Open Roblox and join a game
Attaching needs a live game process. Wait until you are fully in the game, not sitting on the loading screen.
4
Press Attach
The button sits on the editor toolbar. It goes green once the client is injected and the execution path is live.

Your antivirus will probably complain

Executing scripts means writing into another process's memory, which is exactly what a scanner is built to flag. Every build is uploaded to VirusTotal and the results are published on the security page — check them, then add an exclusion if you are happy.

What Attach actually does

Attach injects the World API into the running Roblox process and opens the channel the editor sends your scripts down. Until it succeeds there is nowhere for loadstring to run, so Execute does nothing.

You only need to attach once per Roblox session. Rejoining a game keeps the attachment; restarting Roblox does not. You can switch Roblox accounts without restarting the client.

Verify the attachment

-- A quick sanity check that you are attached and running
-- with executor identity rather than as a game script.
print(identifyexecutor())        --> "World", "1.2.65-UND"
print(getthreadidentity())       --> 8
print(checkcaller())             --> true

When it will not attach

Symptom	Usual cause
Attach does nothing	Roblox is not running, or you are still on the loading screen. Wait until you are in the game.
Attach fails immediately	Antivirus quarantined a file. Check the exclusion, then reinstall from the installer.
Attaches, then scripts error	The client is mid-update after a Roblox patch. Restart it and let the update finish.
Game crashes on execute	A script ran before the game finished loading. Wait for the character to spawn first.
Works, then stops after rejoin	Roblox was restarted rather than the place rejoined. Attach again.

If none of that helps, the live status page shows whether the injector, the module or the API are currently down — it is worth checking before reporting a bug.