STL: printing
Geometry-only triangle mesh, the universal 3D printing input.
Comparison中文
STL vs OBJ
STL and OBJ are both triangle mesh formats, but they target different stages. STL is the standard for 3D printing and stores only geometry, while OBJ adds UVs and material support for rendering and content pipelines.
Published Jun 10, 2026Updated Jun 10, 2026
OBJ: content
Adds UVs and MTL materials for rendering and DCC work.
Pick by purpose
Print with STL, texture and render with OBJ.
When to choose each
Choose STL when your destination is a slicer and 3D printer, where only geometry matters.
Choose OBJ when you need UVs and materials for rendering or DCC pipelines.
Converting between them
Convert STL to OBJ to add a richer mesh container for content work.
For 3D printing, convert your CAD directly to STL instead.