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Can Roblox Studio Open STL Files? How to Import Them

Roblox Studio is the editor for building Roblox experiences; custom meshes come in through its 3D Importer.

Short answer · Convert first

Not directly. Roblox Studio doesn't import STL, so convert the file to OBJ first and import the OBJ.

Open the STL to OBJ converter

Getting an STL file into Roblox Studio

  1. 1Check the fileFind out what units the part was designed in. Almost every printable STL is in millimetres, but the file itself doesn't say.
  2. 2Convert STL to OBJDrop the file into our STL to OBJ converter. It runs in your browser, so the model never leaves your computer.
  3. 3Import into Roblox StudioHome tab › Import 3D, choose the .obj.
  4. 4Check scale and orientationRoblox Studio works in studs and is Y-up. STL files are unitless (slicers assume millimetres), so the size depends on what the exporter assumed.
  5. 5Check materials and animationSTL carries no colour or materials, and no animation. Look at the model under a neutral light before you build on it.

What comes through

ShapeYes, always.
Colours and materialsYes: basic materials in a separate .mtl file.
TexturesSTL doesn't store texture images.
AnimationNo: OBJ has no animation.

Things to watch for

  • Convert STL to OBJ for the 3D Importer; the shape comes through unchanged.
  • Roblox limits triangles per mesh, so simplify dense scans and AI models before importing.

Questions

Does Roblox Studio support STL files?
Not directly. Roblox Studio doesn't import STL, so convert the file to OBJ first and import the OBJ.
Why is my STL model the wrong size in Roblox Studio?
STL files are unitless (slicers assume millimetres), while Roblox Studio works in studs. The 3D Importer preview shows warnings for scale, missing textures and too many triangles; fix them before you click Import.
What is the best 3D format for Roblox Studio?
GLB and FBX are the most reliable choice for Roblox Studio. If you have a choice when exporting, pick GLB over STL.

Menu names follow Roblox's current release. Check the official Roblox Studio documentation if your version differs.

Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.