Convert STL files online for free
The converter easily converts your STL file to various formats - free and online. No SolidWorks or extra software needed.
The converter also works in reverse, so you can convert other 3D formats to STL with high quality output.
The .STL extension primarily refers to the Stereolithography file format, the industry standard for 3D printing and rapid prototyping originally developed by 3D Systems. These files describe the surface geometry of a three-dimensional object as a raw unstructured triangulated surface (a mesh of triangles).
While .STL is universally supported by 3D printers and slicers like Ultimaker Cura, it carries significant limitations. It discards all color, texture, and material attributes, saving only the shape. Furthermore, as a mesh format, it lacks the precise parametric data of native CAD files; users often find .STL files difficult to edit in engineering software like SolidWorks because the curves are approximated by flat triangles, and file sizes can balloon massively with high-resolution scans.
A secondary, unrelated use is the EBU-STL (European Broadcasting Union) format, a binary subtitle standard used in broadcast television. These files are not human-readable text and often fail to open in modern web video players.
Best Conversion Targets:
Use Convert.Guru to open and convert your STL file.
Users also converted 3D, 3MF, GCODE, MAKERBOT, GX, X3G, ZIP, F3D, OBJ, STEP, IPT, SLDPRT and GLB files.
If you want to convert STL file to STEP, GCODE, SVG, DXF, DWG, DGN, RVT, RFA or SKP, you can use Blender or similar software from the "3D Printing Surface Mesh" category. In the File menu, look for Save As… or Export….
To convert SLDASM, DGN, PRT, IAM, X_B, CATPRODUCT, SLDPRT, RVT, ASM, DWG or CATPART files to STL, try Blender or another comparable tool in the "3D Printing Surface Mesh" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our STL converter.