How to Open a File With the IGS File Extension

If you're looking to find out how to open the IGS file extension, you've come to the right place. In most cases, Windows will open a file in the associated program, but some files fall outside of those parameters. Keep reading to find out how you can open your IGS file on both Windows and Mac.

Problem: You Can't Open IGS Files

You might've double-clicked on the file, to be greeted with the "Choose a program to open the file" message. In some cases, you might be able to open the file, but the contents may seem garbled and that's because it was written to be opened in a specific program. Of course, you can't open a IGS file with just any software. Not to worry - we have you covered!

Step 1: Find Out Which Software Uses IGS Files

Computer Files

Opening your IGS file starts with understanding which software uses a IGS extension. In many cases, different types of software may use the same file extensions, also known as file associations.

IGES-Format, CAD Overlay, and Image Systems Grayscale 8-bits are the most popular software packages that use IGS files. Therefore, your best bet would be to download one of these software packages and use one of them to open your file.


Zipped files tend to require special handling and may require password access. Contact the file owner or the person who gave you the file for the password and unzip the file before attempting to open the contents.

Step 2: Learning More About IGS "File Type"

If you can't download IGES-Format, CAD Overlay, or Image Systems Grayscale 8-bits software, or if they don't work to open your IGS file, you may be able to use the file type as a clue to finding out how you can open it. Using a Windows PC, you can right-click and navigate to "Properties" and then to "Type of file". On a Mac, select "More info" and "Kind".

Most likely, you will find that IGS files are considered CAD Files. Because many programs packages utilize CAD Files, you might be able to find a program on your computer that handles those types of files.

If that still does not work, you may have to contact the associated software developer to find out how to open it. Unless you know the specific developer, you could contact one of these developers for assistance.

Please see our chart below of software titles and their developers:

Software Developer
IGES-Format PC Software Company
CAD Overlay Unknown
Image Systems Grayscale 8-bits Unknown

Solution: Use File Magic to Open Your IGS File


Although some files must be opened in binary file format (ie. in the program or device for which it was developed), you might be able to open it with a universal software viewer. Depending on the exact file format, you could use a universal software viewer such as File Magic [download] to open your IGS file. Download File Magic today to open your IGS files and hundreds of other file types with one program.

Download Universal File Viewer (File Magic)