Turn a GLB asset into STL geometry. Set the size, compare both models and download a mesh for your print workflow.
Free · no generation credits
Your model stays on your deviceUp to 100 MB · 1 million triangles
Source file
GLB
GLB → STL
Converted geometry
STL
Your converted model will appear here.
STL has no unit metadata. Set the longest side in millimeters and check it in your slicer.
A scaled, static STL surface. Conversion does not repair holes, add wall thickness or guarantee printability.
REAL CONVERSION EXAMPLE
A textured chair becomes STL geometry.
Compare the original fabric and wood with the actual geometry export. This demo sets a 100 mm longest side; material appearance stays in the GLB.
OriginalGLB
GLB · chair with fabric and wood materials
ConvertedSTL
STL · scaled surface without textures
Drag either model to rotate · zoom to inspect · switch to wireframe
exported triangles
39,936
longest side in this demo
100 mm
binary STL output
1.90 MB
A licensed sample converted with this tool. This is a format demo, not an AI-generated or verified print result. Model source & license · Eric Chadwick · CC0 1.0
GLB vs STL: a rendered scene and a triangle surface
A GLB may look complete because its textures fill in visual detail. An STL can contain only the actual surface geometry, so a print needs a separate structural review.
Source formatGLB
Binary glTF (GLB)
A binary container for a glTF scene. A self-contained GLB can carry geometry, materials, images and animation in one file.
Structure
Scene nodes can position, rotate and scale meshes. The converter bakes static transforms into vertex positions instead of exporting the scene hierarchy.
Color & texture
GLB can store PBR materials and textures. Keep the original GLB if its rendered look matters: the STL and OBJ routes here export geometry only.
Scale & units
glTF uses meters for linear distances. STL export explicitly rescales the bounding box; OBJ export retains the numeric geometry coordinates.
Best suited to
Browser viewing and sharing an asset with appearance. A geometry-only copy is useful when your next tool needs a static mesh.
Output formatSTL
STL triangle surface
A collection of triangles describing the outside of a model. It is a common handoff format for 3D printing slicers.
Structure
Each triangle stores its own corner coordinates and face normal. Fomrix writes binary STL; it does not export CAD sketches or design history.
Color & texture
Standard STL has no texture image, UV layout or material package. A gray preview is expected even if the original was colorful.
Scale & units
STL does not store a unit. This tool writes the size you choose as millimeter coordinates; confirm it on import into a slicer.
Best suited to
Taking a verified surface into a slicer. An STL extension alone does not make an open or thin mesh printable.
Choose a real size before exporting STL
The longest side sets the overall scale; the other two dimensions keep their proportions. Explore the measured sample below before choosing a size for your own file.
Estimated sample dimensions (mm)
All axes × the same scale factorAn explanation using the sample's measured proportions. This does not change the converter settings above or determine wall thickness.
Texture detail is not printable relief
A wood grain image, a normal map or a painted seam can change a render without changing the model's actual shape.
Inspect the real triangles
Switch the comparison to wireframe. Surface detail visible only in a texture will not become raised or engraved geometry in STL.
Separate parts still need planning
A scene can include disconnected pieces and thin sheets. Conversion does not join the pieces, add thickness or make them watertight.
From your file to the next step
Select a step to see what happens. Try the actual conversion above when you are ready.
External geometry buffers are rejected. A .gltf file with separate .bin files cannot be used simply by renaming it .glb.
Export uncompressed geometry
The converter does not support Draco or Meshopt geometry compression. Re-export an uncompressed GLB from your editor when necessary.
Choose the surface and size
The static mesh export ignores textures and animation tracks. Stay within 100 MB and 1 million triangles, then choose a longest side from 1 to 2,000 mm.
UNDER THE SURFACE
How a GLB scene becomes STL geometry
The converter creates a static surface copy. It does not turn the material appearance into printable features.
GLBXYZSTL
01
Read embedded mesh data
Geometry is read from the GLB container without loading its texture images. Line and point objects are excluded.
02
Bake the static scene
Node transforms position the mesh vertices. Exported triangles are combined and scaled together to the chosen longest side.
03
Export without appearance
Binary STL stores the resulting surface. The source scene hierarchy, textures, animation and rig are not part of the STL.
For makers bringing GLB assets into print workflows
3D-printing hobbyists
Bring a GLB prop into a slicer at a known size, then check mesh issues and layer preview.
Artists prototyping a shape
Evaluate geometry independently of its materials. Thin parts still need enough thickness.
Asset creators sharing a mesh
Send STL for a geometry workflow, while keeping GLB for web display and rendered appearance.
A small tool that fits your workflow
Convert, check the result and keep control of your original asset.
Your files stay with you
Local files are read and converted on your device without uploading them. Interactive examples use public sample files.
GLBOBJSTL
Free, without an account
Convert an existing mesh without signing in or spending generation credits.
See what changed
Rotate the source and exported geometry before downloading. The format table tells you exactly what is kept or omitted.
An explicit next step
Set STL dimensions, cancel a conversion or inspect the exported mesh. Errors have a visible message and you can select another file.
AFTER THE DOWNLOAD
Your GLB export still needs a print check
A good-looking rendered model can contain thin surfaces or disconnected parts. Inspect the geometry after conversion.
GLB scene units and unitless STL import settings differ.
What to do
Use the longest-side setting and confirm the destination reads the output as millimeters.
Conversion questions
Will GLB to STL keep materials or animation?
No. STL exports static triangle geometry. Keep the original GLB for materials, UVs, textures and animation.
Can I print the STL immediately?
Check dimensions, holes, non-manifold edges and wall thickness first, then review your slicer. Conversion does not guarantee printability.
Which GLB files are supported?
Use an uncompressed, self-contained GLB 2.0 under 100 MB and 1 million triangles. External geometry buffers and Draco or Meshopt-compressed geometry are not supported by this exporter.
