Convert OBJ to STL File

OBJ to STL ......

The following resources are provided for your reference, focusing on the interoperability and exchange between OBJ and STL files. They are designed to assist you in the transition from OBJ to STL file.


The OBJ (Alias Wavefront Object) is a text-based file format that is widely used for 3D geometry objects across various 3D software programs. The OBJ file format can store named group objects, surface materials with transparent colors and texture images, and geometry primitives in the form of quads or triangles. However, it’s important to note that during the OBJ file conversion using our Autoconverter software, any quad primitives will be simplified into two triangles, as only triangular facets are supported. Additionally, due to its textual format, OBJ files tend to have larger sizes compared to binary file formats like 3DS (3D Studio) or SKP (SketchUp).


The STL (STereoLithography) file format, developed by 3D Systems, a global leader in the 3D printing industry, exclusively contains triangular mesh data. It does not include information on face color, texture, transparency, and named groups. Although it is possible to assign RGB color values to individual vertices, it’s important to note that our STL file converter, Autoconverter software, currently does not support this extension. STL files can be saved in either binary or ASCII text formats, with the binary format being preferred due to its significant reduction in file size. Additionally, it’s worth noting that triangles in STL files are always defined in millimeters, and our STL converter will perform the necessary units conversion if required.