IGES 3D exchange format
File type: 3d graphics, CAD-CAM-CAE file
Files with igs extension can be found as 3D graphics models saved in International Graphics Exchange Standard (IGES) format used for data exchange.
Found 2 different file type records with the same igs filename suffix.
File type category:
3d graphics, CAD-CAM-CAE file
Date updated: June 21, 2025
File extension igs is commonly referring to files in International Graphics Exchange Standard (IGES), an ANSI-approved standard format used with 3D wire frame models originally created in 1979.
One must be very careful when sourcing CAD files from all of today's modern CAD packages, as most/many of them export the long-obsolete "Surfaces NURBS" variation (few people know these differences).
There are 3 primary versions of IGES:
The 1980's "Bounded Surfaces", the 1990s "Surfaced NURBS" and the 2000's modern "BREP Manifold Solids".
One should only export an IGES file in the latter "BREP Manifold Solids" version of IGES. If you try to convert via "Surfaced NURBS" (which has no BREP topology) then the model will be exploded into thounsads of individual NURBS patches, leading to patch cracking, flipped or randomly oriented surfaces, inverted vertex normals (for smoothing) and black banding effects.
People on forums often complain that IGES is not a good CAD conversion file format but that is only because they are using the wrong version and/or poor 3D IGES importers.
Note: IGES files are limited to a file size of 2GB due to their limited internal numeric range.
MIME types:
application/iges
model/iges
Usually *.igs files can be imported to several CAD programs such as CATIA or Autodesk AutoCAD (might require plugin).
Most of the modern CAD/3D modelling programs support IGS/IGES format.
ZEMAX (Microsoft Windows)
CATIA (Microsoft Windows)
TopSolid (Microsoft Windows)
Creo Parametric (Microsoft Windows)
Autodesk Inventor (Microsoft Windows)
Afanche 3D Viewer for Mac (Apple macOS / Mac OS X)
ZEMAX (Microsoft Windows)
CATIA (Microsoft Windows)
TopSolid (Microsoft Windows)
Creo Parametric (Microsoft Windows)
Autodesk Inventor (Microsoft Windows)
TurboCAD for Mac (Apple macOS / Mac OS X)
ZEMAX (Microsoft Windows)
CATIA (Microsoft Windows)
TopSolid (Microsoft Windows)
Creo Parametric (Microsoft Windows)
Autodesk Inventor (Microsoft Windows)
3D-Tool (Microsoft Windows)
Afanche 3D Viewer for Mac (Apple macOS / Mac OS X)
LX-Viewer (Linux/Unix)
ZEMAX (Microsoft Windows)
CATIA (Microsoft Windows)
Autoconverter (Microsoft Windows)
AnyCAD Exchange3D (Microsoft Windows)
T-FLEX CAD (Microsoft Windows)
ZEMAX (Microsoft Windows)
MEDUSA4 (Microsoft Windows)
CrossManager (Microsoft Windows)
SolidWorks (Microsoft Windows)
ACE 3000 (Microsoft Windows)
INOVATE (Microsoft Windows)
CATIA (Microsoft Windows)
AutoCAD (Microsoft Windows)
VectorWorks (Microsoft Windows)
TurboCAD (Microsoft Windows)
Keyshot (Microsoft Windows)
PolyTrans|CAD+DCC (Microsoft Windows)
TransMagic (Microsoft Windows)
Cimatron (Microsoft Windows)
Creo Parametric (Microsoft Windows)
SolidWorks Visualize (Microsoft Windows)
Alibre Design Professional (Microsoft Windows)
Surfcam (Microsoft Windows)
ViaCAD 2D/3D (Microsoft Windows)
3ds Max (3D Studio Max) (Microsoft Windows)
NX (Microsoft Windows)
Solid Edge (Microsoft Windows)
KeyCreator (Microsoft Windows)
MicroStation (Microsoft Windows)
Open CASCADE Technology (Microsoft Windows)
Vector CAD (Microsoft Windows)
Cadwork 3D (Microsoft Windows)
ViaCAD Pro (Microsoft Windows)
EnSuite (Microsoft Windows)
Anark Core (Microsoft Windows)
CAD Exchanger (Microsoft Windows)
BobCAD-CAM Mill (Microsoft Windows)
3D-Tool (Microsoft Windows)
AutoCAD for Mac (Apple macOS / Mac OS X)
TurboCAD for Mac (Apple macOS / Mac OS X)
Shapr3D (Multiplatform)
Online CAD Viewer (Multiplatform)
IGES to SVG converter (On-line services)
3D Transform (On-line services)
Online CAD converter (On-line services)
ACE 3000 (Microsoft Windows)
CrossManager (Microsoft Windows)
3D Object Converter (Microsoft Windows)
SolidWorks (Microsoft Windows)
MEDUSA4 (Microsoft Windows)
IronCAD (Microsoft Windows)
ZEMAX (Microsoft Windows)
CATIA (Microsoft Windows)
AutoCAD (Microsoft Windows)
VectorWorks (Microsoft Windows)
TurboCAD (Microsoft Windows)
Alibre Design Professional (Microsoft Windows)
3ds Max (3D Studio Max) (Microsoft Windows)
VariCAD (Microsoft Windows)
DipTrace (Microsoft Windows)
PolyTrans|CAD+DCC (Microsoft Windows)
TransMagic (Microsoft Windows)
Vector CAD (Microsoft Windows)
MicroStation (Microsoft Windows)
Parasolid (Microsoft Windows)
Solid Edge (Microsoft Windows)
ArtiosCAD (Microsoft Windows)
Autodesk Inventor (Microsoft Windows)
ViaCAD Pro (Microsoft Windows)
EnSuite (Microsoft Windows)
3D-Tool (Microsoft Windows)
CAD Exchanger (Microsoft Windows)
AutoCAD for Mac (Apple macOS / Mac OS X)
ViaCAD 2D (Multiplatform)
Xenon (Multiplatform)
Autodesk Fusion 360 (Multiplatform)
Online CAD converter (On-line services)
Afanche 3D Viewer for Mac (Apple macOS / Mac OS X)
File type category:
3d graphics, CAD-CAM-CAE file
Date updated: February 3, 2017
The igs file extension is associated with the Indigo Renderer, a physicall based and photorealistic rendering software for Microsoft Windows operating system.
The igs file stores scene from Indigo Renderer.
Use Indigo Renderer to work with *.igs files.
Indigo Renderer may be able to export *.igs files to other formats.
Indigo Renderer (Microsoft Windows)
Indigo Renderer (Microsoft Windows)
Indigo Renderer (Microsoft Windows)
Indigo Renderer (Microsoft Windows)
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