RBXL is an extension of files specific to an educational game called Roblox. RBXL files are used to store information about the world in which the game is played. It defines the playing field and the location of the various elements it contains.

RBXL files, like many elements in this game, can be created by its community. An editor called Roblox Studio is used for this. When editing an RBXL file, the user can use the many tools and resources available such as parts, materials, colors, etc.