.IGS

Initial Graphics Exchange Specification

Learn about .igs files - Initial Graphics Exchange Specification. Find software to open, compatibility information, and alternatives.

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.IGS
Initial Graphics Exchange Specification

What is a .igs file?

File Extension Details

The IGES (Initial Graphics Exchange Specification) file format, identified by the .igs extension, is a vendor-neutral file format designed for transferring 2D and 3D geometric data between different CAD (Computer-Aided Design) systems. It was one of the earliest standards developed for this purpose, aiming to overcome the interoperability issues that arose from proprietary CAD file formats. IGES files store information about geometric entities such as points, lines, arcs, splines, surfaces, and solids. They can also contain annotation data like dimensions and text. While IGES has been largely superseded by more modern formats like STEP (.stp), it remains in use, particularly for legacy data and in situations where a widely supported, albeit older, standard is preferred. The format is an ASCII-based format, making it relatively easy to inspect and edit manually, although this also contributes to larger file sizes compared to binary formats. IGES files are often used in industries such as automotive, aerospace, and manufacturing for exchanging design data between different departments or companies using different CAD software packages. The standard is defined by ANSI standard ANSI Y14.26M.

Software Compatibility

Programs that can open and work with .igs files

Windows

Compatible Applications

AutoCAD Compatible
SolidWorks Compatible
CATIA Compatible
NX (Unigraphics) Compatible
Creo Parametric (Pro/ENGINEER) Compatible
FreeCAD Compatible
DraftSight Compatible
Rhino Compatible
Open Cascade Technology (OCCT) Compatible

macOS

Compatible Applications

AutoCAD Compatible
SolidWorks (via Boot Camp or Parallels) Compatible
CATIA (via Boot Camp or Parallels) Compatible
NX (Unigraphics) (via Boot Camp or Parallels) Compatible
Creo Parametric (Pro/ENGINEER) (via Boot Camp or Parallels) Compatible
FreeCAD Compatible
Rhino Compatible
Open Cascade Technology (OCCT) Compatible

Linux

Compatible Applications

FreeCAD Compatible
Open Cascade Technology (OCCT) Compatible
VariCAD Compatible
BRL-CAD Compatible

Mobile

Mobile Applications

Autodesk A360 Compatible
eDrawings Compatible

Frequently Asked Questions

About .igs files

To open a .igs file, you need compatible software. Here are some options:

  • AutoCAD
  • SolidWorks
  • FreeCAD
  • Autodesk A360

To convert a .igs file to another format, you can:

  1. Use compatible software Many programs that open .igs files also allow you to save or export them to different formats.
  2. Try online conversion services: Websites like Zamzar, CloudConvert, or Online-Convert allow you to convert files between different formats without installing software.
  3. Specialized conversion tools: Search for '.igs converter' to find tools specifically designed for this file type.

  1. Verify the file extension is correct:
  2. Update your software:
  3. Try alternative software:
  4. Check for file corruption:

Like any file type, .igs files can be safe or potentially risky depending on their source:

  • Always scan files with antivirus software before opening
  • Keep your operating system and applications updated.
  • Be especially cautious with executable file types

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