Convert 3D model files (STL) online for free
The converter easily converts your STL 3D models to various formats - free and online. No 3D Systems or other 3D software needed.
The converter also works in reverse, so you can convert other "Stereolithography Model" formats to STL without using software like 3D Systems or a similar tool.
The .STL file is a Stereolithography 3D model format. It is the universal standard for 3D printing and computer-aided manufacturing (CAM). Originally developed by 3D Systems, it describes only the surface geometry of a 3D object using a raw unstructured triangulated surface. You can open and view .STL files using Blender, MeshLab, or Meshmixer. You can read more about the technical specifications on Wikipedia.
The .STL format is heavily outdated and severely limited for modern workflows. It only stores triangles. It does not store color, texture, material properties, or physical scale data. Because it relies on raw meshes, a highly detailed model requires millions of triangles, causing the file size to easily exceed hundreds of megabytes. Furthermore, because it is a polygon mesh rather than a solid mathematical body (BREP), you cannot easily edit the geometry parametrically in CAD software like AutoCAD or Rhinoceros 3D.
To overcome these limitations, you should convert the file based on your specific goal. For modern 3D printing that supports colors and better compression, convert to 3MF. If you want to display the 3D model smoothly on a web page, convert to GLTF or GLB. To edit the model mathematically in engineering CAD tools, convert to STEP or IGES. Note: In the broadcasting industry, .STL is also used as an EBU Broadcast Subtitle file, which is completely different and should be converted to SRT or VTT for web video. Drag and drop your file here to analyze and convert it - free, online, and without installing software on convert.guru.
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 3D Systems or similar software from the "3D Printing and Modeling" 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 3D Systems or another comparable tool in the "3D Printing and Modeling" 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.