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.IGS File Extension

File Type 1IGES Drawing File

3.8 (47 Votes)
CategoryCAD Files

What is an IGS file?

An IGS file is a graphics file saved in a 2D/3D vector format based on the Initial Graphics Exchange Specification (IGES). It can store wireframe models, surface or solid object representations, circuit diagrams, and other objects. IGS files are used by many CAD programs as a standard ASCII text-based format for saving and exporting vector data.

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Screenshot of a .igs file in CADEX CAD Exchanger 3.7

IGS file open in CADEX CAD Exchanger 3.7

IGES is a standard for transferring three-dimensional models between CAD programs. You will most likely only encounter an IGS file if you work with CAD software in a field that involves manufacturing, such as the automotive or aerospace industries.

The IGES format was officially introduced in 1980 and was subsequently adopted by many CAD programs. In recent years, however, it has been replaced by the newer STEP (.STP) format.

You can open IGS files with various desktop CAD programs, which includes Autodesk Fusion 360, Dassault Systemes CATIA, Nemetschek VectorWorks, and CADEX CAD Exchanger. You can also open IGS files by uploading them to a program online, such as CADEX CAD Exchanger Cloud or ShareCAD.org.

Since IGS files store plain text information they can be opened with a text editor. However, when viewing the files with a text editor, the contents will appear as text instead of a visual representation of a model, like when viewed with CAD software. You can use Microsoft Wordpad, which is bundled with Windows, or Apple TextEdit, which is bundled with macOS, to view the plain text in IGS files.

NOTE: IGS file may also be saved as .IGES files.

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Programs that open IGS files

Updated 12/20/2019

File Type 2Indigo Renderer Scene File

DeveloperGlare Technologies
3.3 (16 Votes)
Category3D Image Files

.IGS File Association 2

3D scene used by Indigo Renderer, an application used for generating photorealistic images; often saved as an export from another 3D modeling package that has the Indigo Renderer plug-in, including Blender, 3ds Max, Cinema 4D, Maya, SketchUp, or Revit.

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Once a 3D scene has been imported into Indigo Renderer, it can be rendered into a final image. The software supports GPU acceleration so that images can be generated more quickly.

Programs that open IGS files

Updated 7/19/2012

About IGS Files

Our goal is to help you understand what a file with a *.igs suffix is and how to open it.

All file types, file format descriptions, and software programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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