RBXL vs RBXM: Roblox file types explained

.rbxl is a whole place: you open it. .rbxm is a model: you insert it into a place. The ones ending in x (.rbxlx and .rbxmx) are the same files saved as text instead of Roblox's compact format.

• .rbxl

  What it isA whole place: map, lighting, scripts, settings

  How it goes into StudioFile, then Open from File

• .rbxlx

  What it isThe same, saved as text

  How it goes into StudioFile, then Open from File

• .rbxm

  What it isObjects: a model, UI, scripts

  How it goes into StudioRight-click in the Explorer, then Insert from File

• .rbxmx

  What it isThe same, saved as text

  How it goes into StudioRight-click in the Explorer, then Insert from File

• .lua / .luau

  What it isCode as plain text

  How it goes into StudioPaste it into a Script, LocalScript or ModuleScript

• .fbx / .obj

  What it isA 3D mesh from Blender or another app

  How it goes into StudioImport 3D

• .mp3 / .ogg

  What it isA sound

  How it goes into StudioUpload it to Roblox, then put its id in a Sound's SoundId

• .png / .jpg

  What it isA picture for a decal, texture or UI

  How it goes into StudioUpload it to Roblox, then use its image id

• Starting a game from a map or template: a .rbxl. Open it and build on it (how).
• Adding something to a game you already have: a .rbxm. Insert it where it belongs (how).
• A map with terrain: usually a .rbxl. Terrain is part of the place itself, and moving it to another place takes extra steps.

To make a .rbxm from a place, select the objects in the Explorer, right-click and choose Save to File. To make a place from models, insert them into a new place and choose File, then Save to File As.

Every listing shows its file type at a glance, next to its size and what's inside (parts, scripts, meshes). A .zip holds .rbxl or .rbxm files: unzip it first.