.stl
STL modelStereolithography
A mesh format created by 3D Systems in 1987 for stereolithography printers. It describes a surface only as triangles, with no colour, units or materials, in text or binary form.
Sending models to 3D printers and slicers.
Opens in Cura, PrusaSlicer, Bambu Studio, Blender, Quick Look on Mac
About STL files.dae
COLLADA modelCollaborative Design Activity
An XML 3D interchange format created by Sony Computer Entertainment and now maintained by the Khronos Group. It holds geometry, materials, effects, skeletons and animation.
Exchanging models with older engines, SketchUp and Google Earth.
Opens in SketchUp, Maya, Cinema 4D, Quick Look on Mac
About DAE files