Convert IGS to STL
Convert a IGS file to STL in your browser. Free, no upload, no sign-up.
Convert IGS files to STL directly in your browser. The converter reads the exact IGS geometry with the OpenCascade CAD kernel running in WebAssembly, tessellates it at the quality you choose and writes a STL file. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. STL is accepted by every slicer and 3D printer, so it is the safest format to hand to anyone who needs to print your model.
How to convert IGS to STL
- 1Drop your IGS file
Drag a .igs file onto the box above or click to choose one. Surfaces are sewn and tessellated with OpenCascade in the browser.
- 2Pick the mesh quality
Fine gives smoother curves and a larger file, coarse keeps large assemblies light. The default suits most 3D printing jobs.
- 3Check the preview
The model renders in 3D so you can confirm it loaded correctly. Dimensions, volume and triangle count are shown next to it; open edges are flagged if the mesh is not watertight.
- 4Download the STL
Adjust the export options if needed and click download. Colors, textures and materials are dropped because STL cannot store them. Multiple objects are merged into one triangle soup; units are not recorded, so make sure the model is already in millimeters.
What is a IGS file?
.igs is the short extension for an IGES file. The content is identical to .iges: curves and surfaces from a CAD system, without the solid topology that STEP provides.
Commonly used by: legacy CAD, supplier archives
Surfaces are sewn and tessellated with OpenCascade in the browser.
What is a STL file?
STL is the oldest and most widely supported 3D printing format. It stores nothing but a list of triangles, with no color, texture, unit or scale information. Every slicer and almost every 3D tool can read it, which is why it is still the default exchange format for printable models.
Commonly used by: 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables
STL is accepted by every slicer and 3D printer, so it is the safest format to hand to anyone who needs to print your model.
IGS vs STL
| IGS | STL | |
|---|---|---|
| Full name | IGES file (.igs extension) | Stereolithography |
| Encoding | Text | Text or binary |
| Geometry type | Exact (B-rep / curves) | Triangle mesh |
| Colors | Yes | No |
| Textures | No | No |
| Materials | No | No |
| Stores units | Yes | No |
| Multiple objects | Yes | No |
| Typical use | legacy CAD, supplier archives | 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables |