These scripts function by iterating through the game's workspace and modifying "heavy" objects. Key optimizations usually include:

Roblox staff have explicitly stated that using FPS unlockers is not a bannable offense.

Tools like RBXFPSUnlocker are third-party programs that remove the internal frame limiter. Native Roblox FPS Settings

Removing GlobalShadows from the Lighting service and local shadows on parts.

Editing the ClientAppSettings.json file in the Roblox directory allows you to "unlock" the 60 FPS cap manually.

Deleting or disabling Grass , Clouds , SunRays , and Bloom effects.

Forcing all parts to use the "SmoothPlastic" material, which is much easier for GPUs to render.

As of 2024, Roblox has added in the official settings menu. To access it: Open the Settings menu while in-game. Scroll down to the Graphics section.