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STL to GLTF Converter
Prepare and convert 3D models from .STL to .GLTF file format in one app.
- Free plan
- Windows, macOS, Linux
The web app cannot save GLTF: MeshInspector writes GLTF with Save Scene As in the desktop app.
How to convert STL to GLTF
Install and sign in
Download MeshInspector for Windows, macOS or Linux and sign in. The free Community plan is enough.
Open the file
Click Open Files and pick the .stl file.
Save the scene as glTF
Use Save Scene As and choose glTF as the file type.
Save
Pick a folder and save the file.
What to know about STL → GLTF
- STL stores only triangles: no colors, textures or units in the standard format.
- glTF is a JSON scene format; a .gltf often refers to separate .bin and texture files, a .glb packs everything into one file.
- MeshInspector writes glTF only with Save Scene As in the desktop app; the web app cannot save glTF.
- STL has no units, and most slicers read the numbers as millimeters, so check the size after conversion.
- glTF carries scenes, materials and textures for web viewers and game engines.
Online or desktop
Online
The web app has no Save Scene As, so it cannot write GLTF. Use the desktop app for this conversion.
Desktop
The desktop app runs on Windows, macOS (Apple silicon) and Linux. Use it for large files, many files, and the tools the web app does not have. The free Community plan covers opening and exporting; see Pricing for what the paid plans add.
FAQ
Why can't I convert STL to GLTF online?
MeshInspector writes GLTF with Save Scene As, and the web app does not have it. The web app can open .stl files and export single meshes in formats such as STL, OBJ, PLY and 3MF. For GLTF, use the desktop app for Windows, macOS or Linux.
Is the STL to GLTF conversion free?
Yes. Opening the file and Save Scene As are part of the free Community plan, so the conversion costs nothing in the desktop app. Paid plans add tools such as Mesh Healer and automatic repair; the Pricing page lists what each plan includes.
Do I need an account?
Yes. The desktop app asks you to sign in; a free account on the Community plan is enough to open the file and save the scene. The Pricing page lists what the paid plans add, such as repair and measurement tools.
Are colors and units kept?
glTF stores sizes in meters, while the source format may have no units at all, so check the size of the model in the target app. glTF can carry materials and textures; how much of them survive depends on what the source file contains.
Free Community planWindows, macOS (Apple silicon) and Linux
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By Mesh Inspector TeamPublished: Updated:
