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Updated August 2026
Print triangles on screen. Not a painted model.
STL stores a triangle soup for slicers. This viewer shows that soup with a default material so you can spot flipped scale, a tiny mesh, or a wrecked export. It cannot show vertex color or UVs because STL does not keep them. Check the mesh here, then send the same file to your slicer.
Drop binary or ASCII STL. Orbit the hull. Then download or convert if the next tool wants GLB or OBJ.
1
The loader builds a triangle mesh. There is no color channel to keep.
2
A speck or a giant hull usually means units. Fix that in the source, then re-export.
3
Keep STL for the slicer. Convert STL to GLB only if you need a web preview with a default material.
Both can carry triangles. STL is what most slicers eat. OBJ is a wider interchange and still has no reliable PBR here.
| Topic | STL | OBJ |
|---|---|---|
| Job | Slicer and print bureaus | Desktop mesh exchange |
| Color | None | None in this viewer (MTL skipped) |
| Structure | Triangle list, no scene graph | Objects and groups possible |
| This page | Confirm the hull | Confirm the silhouette |
If you started from a GLB, convert GLB to STL on the converter. This viewer will not invent print-ready walls or repair holes.
Slicers already live on your computer. This preview does the same class of local read: File API in, WebGL out. The STL is not stored on 3DLogo.io.
3D printing triangles. No color, UVs, or scene graph. Binary STL on export.
Yes. Drop it here to confirm scale and the hull. This viewer does not repair holes or add walls. Fix that in the source or a mesh repair tool.
STL has no reliable color channel. If you need paint on the web, you needed a GLB. Convert STL to GLB only for a default-material preview.
Both open here. Export from this product is binary STL, which is smaller for the same triangles.
No. The triangles stay on the device. Close the tab to drop them from memory.
Yes. Convert STL to OBJ if a DCC wants text, or keep the STL for the slicer.
Viewing is free. Convert STL to OBJ if a DCC still wants text, or to GLB for a web look with a default material.