Join any Roblox experience
Launch Roblox on desktop and enter an experience. The Maximum Frame Rate control appears in the in-game Settings menu.
RBXFPSUNLOCKERGitHub The current method is built into Roblox. You do not need a third-party FPS unlocker for frame-rate limits up to 240 FPS.
Launch Roblox on desktop and enter an experience. The Maximum Frame Rate control appears in the in-game Settings menu.
Find Maximum Frame Rate. If the option is not visible, update Roblox and restart the client before testing again.
Match the cap to your monitor where practical. Resume the experience, then press Shift + F5 to verify the live frame rate.

A 240 FPS cap does not guarantee 240 rendered frames. The final result depends on the Roblox experience, CPU, GPU, thermals, power settings, and display refresh rate.
Result: the cap is open, but rendering performance is below the target. An FPS booster claim cannot replace hardware or optimization.