.RBXS File Extension

Script created for ROBLOX, an application used to develop and play online multiplayer building games; contains source code written in the Lua programming language; used for creating custom ROBLOX game content, such as vehicles, tools, and new gameplay features.

RBXS files can be executed within ROBLOX Studio by selecting Tools → Execute Script.... They may also be inserted into an existing project by selecting Insert → Object....

NOTE: ROBLOX scripts also use the .LUA and .TXT extensions.