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← 3D Model Converter

Convert STL to glTF online

Drop a .stl file to turn it into glTF. You see the model in 3D before converting, and the file never leaves your device.

What is kept when converting STL to glTF

Geometry
Kept
Materials
Not in STL
Textures
Not in STL
Animation
Not in STL
Scene hierarchy
Not in STL

About STL

Stereolithography

STL describes only the surface of a model as triangles — no colors, materials or textures. It is the default format for 3D printing and slicers.

About glTF

GL Transmission Format 2.0

glTF is the JSON flavour of glTF 2.0. The scene description lives in the .gltf file, while geometry sits in a .bin file and textures in images — select them all together.

How it works

  1. 01

    Drop the .stl file (with its textures or .bin/.mtl files, if any).

  2. 02

    Check the model in the 3D preview; glTF is already selected.

  3. 03

    Click “Convert” and the .gltf file downloads.

Questions

Is the STL to glTF converter free?+

Yes, without limits, sign-up or watermark.

Is my STL file uploaded?+

No. The STL file is read and converted in your browser; nothing is sent to a server.

Why are textures missing after converting STL?+

Textures stored as separate files must be selected together with the model. glTF keeps them only if the format supports textures.

Convert STL to other formats

STL → GLBSTL → OBJSTL → PLYSTL → USDZ

Convert other formats to glTF

GLB → glTFFBX → glTFOBJ → glTFPLY → glTFDAE → glTF3MF → glTFUSDZ → glTF3DS → glTFVOX → glTFVRML → glTF3DM → glTFAMF → glTFLWO → glTFKMZ → glTFMD2 → glTFVTK → glTFSVG → glTF

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