How to view a .IGS file online
From email attachment to readable drawing in seconds.
Choose your file
Drop your .IGS file onto the box above, or click to browse for it.
It opens right away
Your .IGS file is read and drawn right in the page: 2D drawings layer by layer, 3D models and building files as a shape you can orbit.
Explore and measure
Pan, zoom and toggle layers, measure distances, hide walls in a building model, export the drawing as SVG or PNG.
What is a .IGS file?
Drawings, solids and buildings: three very different kinds of "CAD".
An IGS file is a 3D (or 2D) CAD model stored in IGES format, a vendor-neutral ASCII standard used to move part geometry between different CAD programs. To view it free, open it in FreeCAD, Open Cascade CAD Assistant, or upload it to Autodesk Viewer online. To 3D-print it, convert to STL first; you may need a surface-healing step. The extensions .igs and .iges refer to the identical format.
Programs that open .IGS files
| Full name | IGES — Initial Graphics Exchange Specification (CAD model) |
|---|---|
| Developer | US National Bureau of Standards / ANSI (IGES standard); maintained as ANS US PRO/IPO-100 |
| First released | 1980 (IGES 1.0); last version IGES 5.3, 1996 |
| Category | 3D & CAD |
| MIME type | model/iges |
Related viewers
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Is my .IGS file uploaded to your server?
No. Your .IGS file is parsed and drawn for you.
Can you open DWG drawings?
Yes. We decode AutoCAD DWG files (R13 up to the 2018 format) with LibreDWG and draw the real geometry, layers and text. A few DWGs that use features we don't draw yet fall back to the preview image AutoCAD stores inside the file; for those, saving as DXF (File › Save As › DXF) also works.
How do I measure a distance?
Turn on Measure, click the first point, then the second. The distance is shown in the drawing's units, which we read from the file header.
Some text or hatching is missing. Why?
The online viewer draws lines, curves, text, blocks and solids. Hatch patterns, dimension styles and proxy objects from add-ons are simplified or skipped.
Can I see properties of building elements?
Yes. In an IFC model, click any wall, slab, door or window to see its type, name and GlobalId. Use the element types list to hide whole categories, for example walls, to look inside.
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