Convert OBJ to STL
Drop your OBJ files and download them as STL — free, in batch, and they never leave your device.
OBJ → STL: what you should know
OBJ is a veteran, universal text format supported by practically every 3D application. It's used mostly in interchange between 3D apps (Blender, Maya, 3ds Max), texturing, rendering, and it stores geometry, UVs and normals (materials live in a separate MTL file). STL, on the other hand, is the standard format of 3D printing: a triangle mesh with no explicit units, no color and no materials — the format expected by slicers (Cura, PrusaSlicer, Bambu Studio), FDM and resin 3D printing, CAD.
This tool converts your OBJ files to STL right in the browser: no queue, no artificial size limit and, above all, your file is never uploaded to any server. Geometry is preserved with the exact coordinates and scale of the original — important if the model is going to be printed or measured.
Keep in mind: STL stores geometry only: materials, textures and colors are lost. If you need to keep that data, convert to a format that supports it (GLB keeps materials and textures; PLY keeps vertex colors).
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