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
Select the format by its destination. A GLB file holds the geometry, the materials, and the textures in one binary file. Use GLB for web viewers, AR, game engines, and any screen. An STL file holds only triangles, with no color and no units. Every slicer accepts an STL file, so it is the safe default for 3D printing. A 3MF file is also for printing, but it is a richer zipped package. It holds millimeter units inside the file. 3MF is the native format of Bambu Studio. Choose 3MF if you use Bambu Studio or if you upload to MakerWorld. An OBJ file is a mesh format that almost every 3D editor imports. Choose OBJ if you clean up or sculpt the model in Blender, Maya, or ZBrush. MakeIt3D exports all four formats from the same model, so you can change this choice later.
How to choose the right export format
Every MakeIt3D generation makes a GLB master file. Your browser converts the other formats from it at download time. So you can get several formats from one generation. This costs no extra credits.
To show the model on a screen, pick GLB
GLB is the binary form of glTF. It carries the geometry, the PBR materials, and the textures in one file. Web viewers, AR Quick Look, and game engines load it directly. GLB is the only MakeIt3D export that keeps the textures.
To print on any printer, pick STL
STL is the universal slicer format. It holds only surface triangles, with no color and no units. Set the size in millimeters in your slicer. MakeIt3D writes a binary STL and merges all parts into one mesh.
To print through Bambu Studio, pick 3MF
3MF is a zipped XML package. It is the native format of Bambu Studio. The MakeIt3D 3MF export holds millimeter units inside the file. So the model opens at a set size and does not use the slicer defaults. You can also upload a standard 3MF file to MakerWorld.
To edit in a 3D application, pick OBJ
OBJ is a simple mesh format. Blender, Maya, 3ds Max, and ZBrush all import it easily. The MakeIt3D OBJ export holds the geometry. The textures stay in the GLB file. Download both files if you need the textures.
If you are not sure, keep the GLB
GLB is the most complete version of the model, because it keeps the textures. You can download the same generation as STL, 3MF, or OBJ later. The format conversion never costs credits.
Format cheat sheet
One line for each format that MakeIt3D exports.
- GLB: geometry and PBR textures in one binary file. Best for web, AR, and game engines.
- STL: triangles only, no color, no units. Binary format. Opens in every slicer.
- 3MF: zipped XML package with millimeter units. Native to Bambu Studio.
- OBJ: a mesh format for Blender, Maya, and other editors.
- MakeIt3D exports all four formats from the same model. The conversion runs in your browser.
- Only GLB keeps the textures. The other three formats hold only geometry.
FAQ
Which format is best for 3D printing: STL or 3MF?
Both formats slice the same for single-material prints. 3MF is better in Bambu Studio, because it holds millimeter units and removes size guesswork. STL is better for compatibility, because 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. They open directly in Bambu Studio. You can upload a standard 3MF or STL file to MakerWorld like any other model. You do not need a special step.
Why is GLB preferred for web and AR?
GLB holds the geometry, the materials, and the compressed textures in one binary file. Browsers and AR viewers read it directly. One file has no broken texture paths. Multi-file formats often break the texture paths.
Does the OBJ export include textures?
No. The OBJ download holds the mesh geometry. The textures stay in the GLB export. To edit in Blender with the textures, import the GLB file too.
Can I convert between formats after generating?
Yes. MakeIt3D stores the model as GLB. Each download converts it to your format in the browser. A change of format uses no credits. You do not need to generate the model again.