GLTF → STL: from web model to 3D printing.
Please wait
Extract the mesh from a GLTF file, including meshes stored in external buffers, and export it as STL for 3D printing. Animations and materials are not carried over, and meshes from multiple nodes are usually merged into one. Check that the model is watertight and correctly sized before slicing. Everything runs locally in your browser, so your files are never uploaded.
DefaultY-up
Determines the 'up' axis of the exported model. Different 3D software uses different conventions. Selecting the wrong system may cause the model to lie on its side.
Convention used by OpenGL, Three.js, and most Web 3D engines. Choose this for models from web or game engines.
Convention used by Blender (default), 3ds Max, and some CAD software. Try this if the model appears sideways.
Default0°
Range-180° – 180°
Rotate the model around the X axis (degrees). Useful for correcting axis misalignment or print orientation.
Default0°
Range-180° – 180°
Rotate the model around the Y axis (degrees). Useful for correcting axis misalignment or print orientation.
Default0°
Range-180° – 180°
Rotate the model around the Z axis (degrees). Useful for correcting axis misalignment or print orientation.
DefaultRoot node transform
Choose how rotation is written to the exported model. Baking into vertices rewrites all vertex coordinates so every export format (including geometry-only formats such as STL and STEP) applies it consistently; root node transform keeps the original vertex coordinates, which is friendlier to animated or skinned models, but formats that ignore node transforms (such as STEP) won't apply the rotation.
Rotation is written into all vertex coordinates and applies consistently to every export format; geometry data is rewritten.
Rotation is written as a root node transform while vertex coordinates stay unchanged; better for skinned or animated models, but formats that ignore node transforms (such as STEP) won't apply it.
DefaultBinary STL
Choose the STL storage format. Both formats produce identical print results.
Smaller file, faster to load. Supported by Cura, PrusaSlicer, Chitubox and all major slicers. Recommended for 3D printing.
Plain text format, readable in any text editor for debugging. File size is ~4-6x larger than binary.
Export independent meshes as separate STL files packaged in a ZIP archive.
Drag in the GLTF file; external buffers and textures are fine, and textures don't affect the STL. A ZIP package works too.
In the preview, confirm the model is watertight and sized correctly before you slice.
Download the result; meshes from multiple nodes are usually merged, and animations and materials are removed.
No. STL stores only static shape, so all animation data is discarded. Pose the model the way you want it printed before converting.
Yes, all visible meshes in the scene are combined into a single STL file. To export parts separately, edit the GLTF to keep only the target mesh, then convert again.
No, STL conversion only needs geometry, so textures are not required. However, if the GLTF references an external .bin file for mesh data, make sure that file stays in the same directory.
Import the STL into your slicer first: most slicers flag non-watertight meshes automatically. You can also run the model through an online printability checker.
The STL output is the same; only the source format differs. Use gltf-to-stl for a multi-file GLTF set and glb-to-stl for a single binary GLB. Both produce a printable STL.
Yes. An embedded GLTF with all resources inlined converts directly, with no need to unpack it first. The STL is generated from the current file content and is ready for 3D printing.
How many bytes does vertex data actually take? Quantization, MeshOpt, and Draco - which tool fits which scenario? It's not about 'Draco is best,' but 'the right tool for the right job.'
Take a 50MB PBR model through the full pipeline—Blender export, vertex compression, KTX2 texture conversion, engine loading—and get it under 5MB. Includes a complete automation script and a series cheat sheet.
A deep-dive comparison of 3MF and STL in real-world workflows. Uncover why Bambu Studio models crash in Cura, and master unit scaling fixes and multi-color conversion tricks.
Demystifying the technical black box of converting CAD solids (B-Rep) to STL polygon meshes and back. Get practical slider recommendations for SolidWorks and other tools, plus compromise solutions when STL reverse engineering fails.
