IGS DWG
Free online converter

Convert IGS to DWG

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IGS to DWG converterFREE
Drop a .IGS file here
or pick one - we convert it to .DWG and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Nov 2026

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How to convert IGS to DWG

  1. Add your .IGS file - drop it in the box above or click to browse.
  2. Convert it to .DWG in a few seconds.
  3. Download your new .DWG file.

What to expect

  • Parametric history, feature trees, and assembly structure are not preserved - only final geometry (surfaces, solid bodies, wireframes) lands in the DWG.
  • Surface gaps in the source IGS carry over into the DWG; fixing them in the originating CAD system before converting gives the cleanest result.
  • DWG has multiple versions tied to AutoCAD releases (2013, 2018, etc.) - choose the version your recipient's software supports; 2013 is a safe default.

Frequently asked questions

Will the 3D geometry survive the conversion?
Yes, 3D surfaces and solid bodies transfer to DWG. Whether they form a usable closed solid depends on whether the original IGS file was watertight.
Can I convert IGS to DWG for free?
Yes - use our converter above at no cost. FreeCAD is a free desktop option but exports DXF rather than DWG.
What is the difference between DWG and DXF?
DXF is an open, text-based exchange format; DWG is AutoCAD's binary native format. Both open in AutoCAD, but DWG is required for full AutoCAD compatibility.
Does the conversion preserve layer names and colors?
Generally yes - geometry, layers, and colors from the IGS file are mapped to DWG equivalents, though complex layer hierarchies may be flattened.
Learn about the formats: .IGS · .DWG
Programs that convert IGS: AutoCAD · TurboCAD · CATIA · AutoCAD for Mac