IGES to OFF Converter
Drop a .igs file below and get a .off back. The conversion happens inside this page using WebAssembly, so nothing is uploaded to a server and there is no queue to wait in.
- Private by designFiles stay on your device.
- No queueConversion starts instantly.
- No sign upNo account, no limits per day.
Compatibility
What survives the trip from IGES to OFF.
| Feature | IGES | OFF | Result |
|---|---|---|---|
| Geometry | Supported | Supported | Supported |
| Vertex colors | Partial | Partial | Partial |
| Materials | Not supported | Not supported | Not supported |
| Textures | Not supported | Not supported | Not supported |
| Scene hierarchy | Partial | Not supported | Not supported |
| Animation | Not supported | Not supported | Not supported |
How to convert IGES to OFF
- 1Add your IGES fileDrop the .igs file into the box, or pick it from disk. Multiple files are converted one after another.
- 2Pick OFF as the outputOFF is already selected on this page. Adjust scale, up axis or triangle budget if the target application is picky.
- 3Download the resultThe .off file is written locally and appears as a download button next to your file.
About IGES
IGES predates STEP and is still produced by older CAM and CAD systems. It excels at surfaces and curves rather than solids, so imported models sometimes arrive as loose surface patches instead of closed volumes.
- CATIA
- NX
- SolidWorks
- Mastercam
- FreeCAD
About OFF
OFF lists vertex counts, then vertices, then polygons. That is nearly all there is to it, which is why computational geometry papers, mesh processing libraries and university courses lean on it so heavily.
- MeshLab
- Geomview
- CGAL
- libigl
Questions
Is this IGES to OFF converter free?
Yes. There is no account, no daily quota and no watermark. The tool is a static web page and the work is done by your own CPU, so there are no server costs to pass on.
Are my files uploaded anywhere?
No. MeshFormat loads a WebAssembly build of the geometry kernels into your browser and reads the file locally. You can open the network tab and confirm that nothing leaves the page, or disconnect after the page has loaded and keep converting.
How large can a IGES file be?
The practical limit is your available memory rather than an arbitrary cap. Models up to a few hundred megabytes work on a normal laptop; very dense scans convert faster if you lower the triangle budget in the options.
What is lost when converting IGES to OFF?
Scene hierarchy: the scene tree is flattened, so parts arrive as a single level list rather than nested groups.
Which programs open OFF files?
MeshLab, Geomview, CGAL, libigl and most other tools that work with 3D meshes read .off directly.