Convert GLB to STL
Drop in a .glb or .gltf and get a binary STL back, ready to open in PrusaSlicer, Cura or Bambu Studio. The conversion happens on your machine.
Drop a GLB file
or click to choose one. Your file never leaves your browser.
Runs entirely in your browser. Your file is never uploaded, and there is no sign-up.
What you get, and what you lose
STL stores a single mesh as raw triangles. That is why it is the universal 3D printing format and also why the conversion is lossy in one specific way: everything except geometry is discarded. Colour, texture maps, materials, and any separate objects in the scene are merged down to one shape. That is the format, not the converter.
If colour matters for your print, export 3MF instead. It carries colour and material data and is supported by most current slicers and multi-material printers.
Before you print
A converted mesh is not automatically a printable one. Models produced by AI generation or photogrammetry frequently contain holes, self-intersections, or non-manifold edges that a viewer renders perfectly happily and a slicer refuses. Every major slicer has a repair pass:
- PrusaSlicer: right-click the object, then Fix by Netfabb.
- Cura: Extensions, Mesh Tools, Fix simple holes.
- Bambu Studio: right-click, Fix model.
Also check wall thickness. A model built for a screen has no minimum thickness, so thin details that look fine in a viewer can come out below what your nozzle can actually lay down.
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Frequently asked
Will the STL keep my textures and colours?
No, and no STL ever does. The format stores triangles and nothing else, so colour, texture and material information are dropped by definition. If you need colour on a print, export 3MF instead, which most modern slicers accept.
Is the STL ready to print?
It is ready to open in a slicer, which is not quite the same thing. This tool converts the mesh faithfully; it does not repair it. Meshes from AI and photogrammetry pipelines often have holes or non-manifold edges, so run the repair step in PrusaSlicer, Cura or Bambu Studio before printing.
Is the file uploaded to a server?
No. The conversion runs in your browser using your own machine's memory and CPU. Nothing is transmitted, and there is no account or email gate.
What scale will the model be?
Whatever scale it was authored at. glTF works in metres and STL is unitless, so slicers usually interpret the numbers as millimetres. If your model imports a thousand times too small or too large, that mismatch is the reason, and scaling in the slicer fixes it.
Binary or ASCII STL?
Binary. It is roughly a third the size of ASCII for the same mesh and every slicer reads it.
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Last updated 2026-07-30