Convert STL to GLTF Online
Convert STL 3D models to GLTF (embedded, JSON glTF) directly in your browser — a free .stl to gltf converter with no upload and no install. Preview the geometry, then download a single, human-readable GLTF file.
Need the compact binary version instead? Try the STL to GLB converter.
Drop your STL file here
Supported format: .STL
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Frequently Asked Questions
What is a GLTF file?
GLTF is the plain-text (JSON) form of glTF, a compact 3D format designed for fast loading in web viewers, AR experiences, and game engines.
What's the difference between GLTF and GLB?
They're the same underlying format. GLB packs everything into one compact binary file; this GLTF export embeds the same geometry as base64 text inside a single human-readable JSON file — useful when you need to inspect or edit the file directly.
Is GLTF a print-ready format?
No. GLTF is intended for real-time rendering (web, AR, games) rather than 3D printing — use the STL to G-code tool if you want to print your model.
Is my STL file uploaded to a server?
No. The conversion happens entirely in your browser. Your file is never sent to our servers.
Does the GLTF file include materials or textures?
This converter applies a simple default material, since STL itself carries no color or texture data to preserve.
Can I use this GLTF with AR Quick Look or model-viewer?
Yes. GLTF is directly supported by web 3D viewers such as <model-viewer>, and by most Android AR viewers. iOS AR Quick Look specifically requires the binary GLB or USDZ form.