Windows · CAD legacy
IGES viewer for Windows.
Free from the Microsoft Store. Opens .iges and .igs files without a SolidWorks or CATIA license. On-device tessellation, double-click file association, no cloud round-trip.
What you can do with it
- Open .iges and .igs files — the two extensions of the same format
- Double-click file association
- Orbit, measure, cross-section
- Solid, wireframe, X-ray modes
- Screenshot to PNG, orbit GIF for a report
Why IGES still matters
IGES (Initial Graphics Exchange Specification, 1980) was the first neutral CAD interchange format. STEP replaced it as the industry default in the late 1990s, but IGES survives in specific corners: aerospace and defence supply chains, older mould-tool workflows, and any customer whose CAD pipeline still uses 20-year-old translators. If a vendor ships you an .igs, that's usually why.
Open3D handles both IGES and STEP through the same OpenCASCADE-based tessellator, so a mixed IGES/STEP pipeline needs one viewer instead of two.
Privacy
Parsing is entirely on-device. No upload. No account. No ads on Windows.
FAQ
Do I need SolidWorks or CATIA?
No. Open3D tessellates IGES natively. Free.
How does IGES compare to STEP?
STEP is newer, better-defined, more widely supported. IGES survives in specific legacy pipelines. See STEP vs IGES for the full comparison.
Can it convert IGES to STEP or STL?
Not from within the app yet. On the roadmap. For today, use FreeCAD (free) to convert.
How big an IGES file can it open?
Up to 2 GB, though real-world assemblies usually top out well below that. Tessellation time scales with complexity.