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PhotoGenius

Free 3D converter

Convert STL to GLB

Drop a STL file and download it as GLB. The conversion runs in your browser, so the file never leaves your device. It keeps the exact shape.

Free, no sign-up, and your file stays on your device.

Drop a STL file here

Converted to GLB in your browser. Nothing is uploaded.

GLB, glTF, OBJ, STL, PLY, FBX or 3MF, up to 300 MB. Add .mtl, .bin and texture files alongside.

What carries over from STL to GLB

Checked against what the converter writes, not just what the formats allow.
Shape (triangles)
Kept exactly
UV coordinates
Not in STL
Colour texture
Not in STL
PBR maps (roughness, metalness, normal)
Not in STL
Vertex colours
Not in STL
Animation
Not in STL
Separate parts
Not in STL
Size and units
Millimetres become metres, so the model opens at its real size.
Up direction
Turned Y up, so the model stands upright in viewers.

How to convert STL to GLB

  1. Add your STL

    Drop the .stl file or choose it from your device.

  2. Check the preview

    Turn the model and check what will be kept before converting.

  3. Download the GLB

    The .glb is written in a second or two for most models.

When to convert STL to GLB

  • To put it on the web

    GLB is what three.js, Google's <model-viewer> and most web viewers load: one file, textures included.

  • For Blender and Godot

    Both import glTF natively, with materials, so there is no .mtl or texture folder to keep together.

The two formats

STL

Stereolithography

STL was created by 3D Systems in 1987 for its stereolithography printers. It stores a surface as a list of triangles and nothing else: no colour, textures or units.

Usually comes from
print libraries such as Printables and Thingiverse, CAD exports and 3D scanners
Opens in
every slicer (Bambu Studio, PrusaSlicer, OrcaSlicer, UltiMaker Cura and others) and most 3D apps
Units
None recorded (read as millimetres by slicers)
Up axis
Z up by convention

GLB

Binary glTF 2.0

GLB is the single-file, binary form of glTF 2.0, the open format the Khronos Group published in 2017 for delivering 3D assets. Mesh, materials, textures and animation all travel in one file.

Usually comes from
AI 3D generators (including PhotoGenius), Sketchfab downloads, web 3D projects and game asset stores
Opens in
Blender, Godot, three.js and most web viewers, Android's Scene Viewer, Bambu Studio and UltiMaker Cura, Unreal's glTF importer, and Unity with the glTFast package
Units
Metres
Up axis
Y up

Need a model to convert?

Make one with AI from a photo or a sentence, then download it as GLB and convert it here.

Questions

Something else? Ask us and a person will answer.

Is this STL to GLB converter free?

Yes. There is no account, watermark or limit on conversions. It accepts files up to 300 MB; how large a model your browser can handle depends on your device's memory.

Is my file uploaded?

No. The conversion runs in your browser with the open-source three.js loaders and exporters, so your STL never leaves your device.

Does the GLB keep textures and animation?

Yes, everything the STL has that glTF supports: geometry, UVs, materials and textures embedded in the file.

Can I make a 3D model from a photo instead?

Yes. PhotoGenius turns a photo or a text prompt into a textured GLB with Rodin Gen-2.5, Rodin Gen-2.5 Fast, Tripo H3.1, TRELLIS.2, Rodin Gen-2 or Hunyuan3D 3.1, which you can then convert here. See Image to 3D model.

Turn a photo into a 3D model

Rodin Gen-2.5, Rodin Gen-2.5 Fast, Tripo H3.1, TRELLIS.2, Rodin Gen-2 or Hunyuan3D 3.1 builds a textured GLB from one image. The price shows before you run it.

Make a 3D modelAbout the 3D generator