glTF to STL converter

Drop a glTF file, check the preview, download STL. The conversion runs in your browser, so your model never leaves your device.

Convert the attached glTF file to STL

Files are processed entirely in your browser. Nothing is uploaded to a server.

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How the conversion works

glTF is a JSON scene format for web and real-time 3D. A .gltf file often references separate buffer and texture files, while GLB packs everything into one binary.

The converter writes binary STL, which is what slicers expect. Drop the result straight into Bambu Studio, PrusaSlicer, Cura, or any other slicer.

One thing to watch: glTF stores coordinates in meters, while STL is usually read as millimeters. If your model arrives 1000 times too small, tick the meters-to-millimeters option before converting.

Frequently asked questions

Does my file get uploaded?

No. Parsing and export run in your browser with WebAssembly and three.js. The file stays on your device, and it works offline once the page has loaded.

What survives the glTF to STL conversion?

Geometry comes through completely: every triangle, at full precision. Materials, textures, and vertex colors are dropped, because STL as written here stores plain triangles only.

Is there a file size limit?

Files up to 300 MB and 8 million triangles work. Heavier meshes take longer rather than failing outright; if a file is unwieldy, reduce its triangle count first with the reduce tool.

More glTF conversions

glTF → OBJ glTF → GLB All converters

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