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.

Any 3D edit is just a prompt away.

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.

glTF stores coordinates in meters, while STL is read as millimeters, so the converter multiplies every coordinate by 1000 and the part keeps its real size. If it arrives 1000 times too large, the file was saved in millimeters anyway: tick the 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?

Models up to 8 million triangles work. STL files can be any size below that; other formats stop at 300 MB. 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

More free 3D file tools

View a model Repair a model Reduce file size Convert 3D files Measure a model Scale a model Split a model Mirror a model Print orientation Print weight & cost

Describe a part. Get a printable model.

GrandpaCAD turns a text prompt into a ready-to-print 3D model. Functional parts, organic shapes, multi-color prints. No CAD skills needed.

"Model a snap-fit clip that holds a phone charging cable on a desk edge up to 25 mm thick."

3 free generations, no card required

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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.

Any 3D edit is just a prompt away.

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.

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?

More glTF conversions

glTF → OBJ glTF → GLB All converters

More free 3D file tools

View a model Repair a model Reduce file size Convert 3D files Measure a model Scale a model Split a model Mirror a model Print orientation Print weight & cost

Describe a part. Get a printable model.

GrandpaCAD turns a text prompt into a ready-to-print 3D model. Functional parts, organic shapes, multi-color prints. No CAD skills needed.

"Model a snap-fit clip that holds a phone charging cable on a desk edge up to 25 mm thick."

3 free generations, no card required