GLB vs STL vs OBJ vs 3MF: Which 3D Format to Use
GLB for web and AR, STL or 3MF for printing, OBJ for editing. A practical comparison of the four formats MakeIt3D exports, with a clear pick per use.
Short answer
Pick the format by destination. GLB packs geometry, materials, and textures into one binary file, so use it for web viewers, AR, game engines, and anywhere the model is shown on a screen. STL stores plain triangles with no color and no units, and every slicer accepts it, so it is the safe default for 3D printing. 3MF also targets printing but is a richer zipped package with millimeter units declared inside the file; it is the native format of Bambu Studio, so choose it if your printing workflow runs through Bambu Studio or you plan to upload to MakerWorld. OBJ is a widely supported mesh format that virtually every 3D editor imports; choose it when the model will be cleaned up or sculpted in Blender, Maya, or ZBrush. MakeIt3D exports all four formats from the same generated model, so this choice is reversible.
How to choose the right export format
Every MakeIt3D generation produces a GLB master. The other formats are converted from it in your browser at download time, so you can grab several formats from one generation at no extra credit cost.
Showing the model on screen: pick GLB
GLB is the binary form of glTF and carries geometry, PBR materials, and textures in a single file. Web viewers, AR Quick Look pipelines, and game engines load it directly. It is the only MakeIt3D export that keeps the model's textures.
Printing on any printer: pick STL
STL is the universal slicer format. It stores surface triangles only, with no color and no units, so set the size in millimeters in your slicer. MakeIt3D writes binary STL with all parts merged into one mesh.
Printing through Bambu Studio: pick 3MF
3MF is a zipped XML package and the native format of Bambu Studio. MakeIt3D's 3MF export declares millimeter units inside the file, so the model opens at a defined size instead of relying on slicer defaults. Standard 3MF files also upload to MakerWorld.
Editing in a 3D application: pick OBJ
OBJ is a simple, widely supported mesh format that Blender, Maya, 3ds Max, and ZBrush import without friction. MakeIt3D's OBJ export carries the geometry; textures stay with the GLB, so download both if you need them.
Not sure yet: keep the GLB
GLB is the most complete version of the model since it retains textures. You can re-download the same generation as STL, 3MF, or OBJ later, and the format conversion itself never costs credits.
Format cheat sheet
One line per format, as exported by MakeIt3D.
- GLB: geometry plus PBR textures in one binary file; best for web, AR, and game engines.
- STL: triangles only, no color, no units; binary encoding; opens in every slicer.
- 3MF: zipped XML package with millimeter units declared; native to Bambu Studio.
- OBJ: broadly compatible mesh format for Blender, Maya, and other editors.
- All four are exported from the same generated model; conversion runs in your browser.
- Only GLB keeps textures; the three mesh formats are geometry-only exports.
FAQ
Which format is best for 3D printing: STL or 3MF?
Both slice identically for single-material prints. 3MF has the practical edge in Bambu Studio because it declares millimeter units inside the file, removing scale guesswork. STL wins on universality: every slicer and print service accepts it.
Do MakeIt3D files work with Bambu Studio and MakerWorld?
Yes. The STL and 3MF exports are standard files that open directly in Bambu Studio, and standard 3MF or STL files can be uploaded to MakerWorld like any other model. No special integration or conversion step is involved.
Why is GLB preferred for web and AR?
GLB bundles geometry, materials, and compressed textures into one binary file that browsers and AR viewers parse natively. One file means no broken texture paths, which is the classic failure mode of multi-file formats.
Does the OBJ export include textures?
No. The OBJ download carries the mesh geometry, while textures remain in the GLB export. If you are editing in Blender and want the textures too, import the GLB instead or alongside.
Can I convert between formats after generating?
Yes. The generated model is stored as GLB, and each download converts it to your chosen format in the browser. Switching formats does not use credits and does not require regenerating the model.